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40 vulnerabilities found for Ech0 by lin-snow
CVE-2026-79673 (GCVE-0-2026-79673)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Scope Bypass via profile:read Token
Summary
Ech0 before 4.4.3 protects the PUT /user endpoint with the profile:read scope, a read-only scope, but allows write operations including password changes. An attacker with an admin's profile:read access token can change the admin's password and login to obtain an unrestricted session token that bypasses all scope enforcement.
Severity
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79672 (GCVE-0-2026-79672)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 13:21
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Authentication Bypass via Comment Panel
Summary
Ech0 before 4.4.3 fails to enforce scope-based authorization on nine comment panel admin endpoints, allowing access tokens with minimal scopes to perform full comment moderation operations. Attackers with a limited-scope access token can list, approve, reject, delete comments, and modify comment system settings by directly accessing the unprotected panel endpoints.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:18 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79671 (GCVE-0-2026-79671)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 SSRF via DNS Resolution Bypass
Summary
Ech0 through 4.2.1 contains a server-side request forgery vulnerability in the validateWebhookURL function (webhook_setting_service.go), which only validates literal IP addresses via net.ParseIP() and fails to reject hostnames that DNS-resolve to private or internal IPs (e.g., 169.254.169.254.nip.io). An attacker with admin privileges can create a webhook with such a hostname to bypass validation and cause the server to make requests to internal services, cloud metadata endpoints, and private network resources. The issue is fixed in 4.4.3.
Severity
5.5 (Medium)
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79670 (GCVE-0-2026-79670)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 17:30
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Stored XSS via SVG Upload
Summary
Ech0 before 4.4.3 contains a stored cross-site scripting vulnerability in the file upload endpoint that validates Content-Type using only client-supplied headers without server-side inspection. Attackers with admin privileges can upload SVG or HTML files containing JavaScript that executes in the application origin when accessed by any user, enabling session hijacking and data exfiltration.
Severity
4.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 17:30 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79669 (GCVE-0-2026-79669)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 12:57
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Missing Authorization on System Logs
Summary
Ech0 before 4.4.3 lacks authorization checks on system log endpoints allowing any authenticated non-admin user to read and stream all server logs. Attackers can access historical logs and real-time log streams via GET /api/system/logs, GET /api/system/logs/stream, and WS /ws/system/logs to gather reconnaissance data including internal file paths, error stack traces, and application state.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 12:56 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79668 (GCVE-0-2026-79668)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation
Summary
Ech0 before 4.7.3 contains an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint that allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can send repeated requests to arbitrarily inflate the fav_count field for any known echo identifier, compromising the integrity of engagement metrics and social ranking systems.
Severity
5.3 (Medium)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79667 (GCVE-0-2026-79667)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 13:28
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement
Summary
Ech0 version 4.3.4 and earlier fails to reliably enforce scoped access token (least-privilege) restrictions on several privileged admin routes. Multiple privileged endpoints (e.g., /api/inbox, /api/panel/comments, /api/backup/export) omit scope checks and authorize based only on the user's admin role, and the backup export handler discards token scope metadata entirely. An attacker holding a deliberately limited (low-scope) admin access token can reach broader privileged functionality than intended, including reading the inbox and exporting a full database backup ZIP archive. Fixed in 4.4.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:24 UTC
CWE
- CWE-285 - Improper Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79666 (GCVE-0-2026-79666)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints
Summary
Ech0 before 4.4.3 fails to enforce administrator authorization on dashboard log endpoints, allowing any authenticated user to access system logs. Attackers with valid user sessions can query GET /api/system/logs and subscribe to SSE and WebSocket log streams to retrieve sensitive operational data including file paths, stack traces, and internal URLs.
Severity
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79665 (GCVE-0-2026-79665)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 15:31
VLAI
EPSS
VEX
Title
Ech0 before 4.5.1 Authorization Bypass via Session Tokens
Summary
Ech0 before 4.5.1 contains an authorization bypass vulnerability where session tokens skip scope validation in RequireScopes middleware, allowing logged-in non-admin users to access admin endpoints. Attackers can read system logs, visitor statistics, user emails, and subscribe to live WebSocket logs by sending authenticated session tokens to unprotected endpoints.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:31 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-13 00:00
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CVE-2026-79664 (GCVE-0-2026-79664)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 13:01
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Access Token Revocation Bypass
Summary
Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero, and admin delete does not blacklist the JTI, leaving stolen tokens cryptographically valid until JWT secret rotation.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:01 UTC
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79663 (GCVE-0-2026-79663)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Stored XSS via RSS feed tag names
Summary
Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS readers that render HTML-type summaries, affecting anonymous subscribers and other users.
Severity
4.8 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79662 (GCVE-0-2026-79662)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 14:51
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass
Summary
Ech0 through 4.5.6 contains an OAuth redirect URI validation vulnerability in parseAndValidateClientRedirect (internal/service/auth/auth.go) that compares only the scheme and host of the client-supplied redirect_uri against the admin-configured allowlist, ignoring path, query, and fragment components. The redirect_uri is embedded into the signed state JWT at login time without validation. An attacker can craft a redirect_uri whose host matches an allowed origin but whose path is attacker-influenced; after the OAuth exchange the victim is redirected to that path with a one-time exchange code in the query string. If the code leaks (e.g., via Referer, analytics, or an open redirect on that host), the attacker can trade it at the public POST /api/auth/exchange endpoint for the victim's access and refresh tokens. Fixed in 4.7.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:30 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79661 (GCVE-0-2026-79661)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Unauthenticated fav_count Modification
Summary
Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endpoint on the public router group without authentication or rate limiting. Unauthenticated attackers can increment the fav_count counter of any echo (including private echoes) by supplying its UUID, which can be harvested from the public GET /api/echo/page feed. Repeated requests are accepted without deduplication, each triggering a database write and a four-key cache invalidation, allowing attackers to inflate popularity metrics and amplify load on the database and cache. Fixed in 4.7.3.
Severity
6.5 (Medium)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79660 (GCVE-0-2026-79660)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 15:32
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Email Disclosure via Public API
Summary
Ech0 versions before 4.7.3 expose guest commenter email addresses through public API endpoints due to improper JSON serialization tags on the Comment model. Unauthenticated attackers can harvest all commenter emails by calling the /api/comments and /api/comments/public endpoints without authentication.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:32 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79659 (GCVE-0-2026-79659)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 13:03
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Server-Side Request Forgery via fetchPeerConnectInfo
Summary
Ech0 before 4.7.3 contains a server-side request forgery vulnerability in the fetchPeerConnectInfo function that uses unvalidated HTTP requests instead of safe request methods with URL validation. Authenticated attackers can supply arbitrary URLs to access internal services and cloud metadata endpoints by triggering connection health checks or peer connection operations.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:02 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79658 (GCVE-0-2026-79658)
Vulnerability from nvd – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 5.0.1 Denial of Service via Accept-Language
Summary
Ech0 before 5.0.1 does not impose any size or shape limit on the Accept-Language header processed by its i18n middleware, which runs on every HTTP request. The header is passed unfiltered to go-i18n's NewLocalizer, which internally calls golang.org/x/text/language.ParseAcceptLanguage. The CVE-2022-32149 mitigation in x/text caps '-' characters but not '_' characters, which the parser aliases to '-', allowing quadratic-time parsing to be triggered with a large header (up to Go's default 1 MiB) built from underscore separators. An unauthenticated attacker can send such requests to consume roughly 1.5 seconds of CPU each, and concurrent requests can saturate a multi-core server (denial of service).
Severity
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-06-04 00:00
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CVE-2026-79673 (GCVE-0-2026-79673)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Scope Bypass via profile:read Token
Summary
Ech0 before 4.4.3 protects the PUT /user endpoint with the profile:read scope, a read-only scope, but allows write operations including password changes. An attacker with an admin's profile:read access token can change the admin's password and login to obtain an unrestricted session token that bypasses all scope enforcement.
Severity
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79672 (GCVE-0-2026-79672)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 13:21
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Authentication Bypass via Comment Panel
Summary
Ech0 before 4.4.3 fails to enforce scope-based authorization on nine comment panel admin endpoints, allowing access tokens with minimal scopes to perform full comment moderation operations. Attackers with a limited-scope access token can list, approve, reject, delete comments, and modify comment system settings by directly accessing the unprotected panel endpoints.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:18 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
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Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79671 (GCVE-0-2026-79671)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 SSRF via DNS Resolution Bypass
Summary
Ech0 through 4.2.1 contains a server-side request forgery vulnerability in the validateWebhookURL function (webhook_setting_service.go), which only validates literal IP addresses via net.ParseIP() and fails to reject hostnames that DNS-resolve to private or internal IPs (e.g., 169.254.169.254.nip.io). An attacker with admin privileges can create a webhook with such a hostname to bypass validation and cause the server to make requests to internal services, cloud metadata endpoints, and private network resources. The issue is fixed in 4.4.3.
Severity
5.5 (Medium)
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79670 (GCVE-0-2026-79670)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 17:30
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Stored XSS via SVG Upload
Summary
Ech0 before 4.4.3 contains a stored cross-site scripting vulnerability in the file upload endpoint that validates Content-Type using only client-supplied headers without server-side inspection. Attackers with admin privileges can upload SVG or HTML files containing JavaScript that executes in the application origin when accessed by any user, enabling session hijacking and data exfiltration.
Severity
4.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 17:30 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79669 (GCVE-0-2026-79669)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 12:57
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Missing Authorization on System Logs
Summary
Ech0 before 4.4.3 lacks authorization checks on system log endpoints allowing any authenticated non-admin user to read and stream all server logs. Attackers can access historical logs and real-time log streams via GET /api/system/logs, GET /api/system/logs/stream, and WS /ws/system/logs to gather reconnaissance data including internal file paths, error stack traces, and application state.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 12:56 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
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Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79668 (GCVE-0-2026-79668)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation
Summary
Ech0 before 4.7.3 contains an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint that allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can send repeated requests to arbitrarily inflate the fav_count field for any known echo identifier, compromising the integrity of engagement metrics and social ranking systems.
Severity
5.3 (Medium)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79667 (GCVE-0-2026-79667)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 13:28
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement
Summary
Ech0 version 4.3.4 and earlier fails to reliably enforce scoped access token (least-privilege) restrictions on several privileged admin routes. Multiple privileged endpoints (e.g., /api/inbox, /api/panel/comments, /api/backup/export) omit scope checks and authorize based only on the user's admin role, and the backup export handler discards token scope metadata entirely. An attacker holding a deliberately limited (low-scope) admin access token can reach broader privileged functionality than intended, including reading the inbox and exporting a full database backup ZIP archive. Fixed in 4.4.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:24 UTC
CWE
- CWE-285 - Improper Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79666 (GCVE-0-2026-79666)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints
Summary
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Severity
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-09 00:00
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CVE-2026-79665 (GCVE-0-2026-79665)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 15:31
VLAI
EPSS
VEX
Title
Ech0 before 4.5.1 Authorization Bypass via Session Tokens
Summary
Ech0 before 4.5.1 contains an authorization bypass vulnerability where session tokens skip scope validation in RequireScopes middleware, allowing logged-in non-admin users to access admin endpoints. Attackers can read system logs, visitor statistics, user emails, and subscribe to live WebSocket logs by sending authenticated session tokens to unprotected endpoints.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:31 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-04-13 00:00
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CVE-2026-79664 (GCVE-0-2026-79664)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 13:01
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Access Token Revocation Bypass
Summary
Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero, and admin delete does not blacklist the JTI, leaving stolen tokens cryptographically valid until JWT secret rotation.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:01 UTC
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79663 (GCVE-0-2026-79663)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Stored XSS via RSS feed tag names
Summary
Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS readers that render HTML-type summaries, affecting anonymous subscribers and other users.
Severity
4.8 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79662 (GCVE-0-2026-79662)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 14:51
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass
Summary
Ech0 through 4.5.6 contains an OAuth redirect URI validation vulnerability in parseAndValidateClientRedirect (internal/service/auth/auth.go) that compares only the scheme and host of the client-supplied redirect_uri against the admin-configured allowlist, ignoring path, query, and fragment components. The redirect_uri is embedded into the signed state JWT at login time without validation. An attacker can craft a redirect_uri whose host matches an allowed origin but whose path is attacker-influenced; after the OAuth exchange the victim is redirected to that path with a one-time exchange code in the query string. If the code leaks (e.g., via Referer, analytics, or an open redirect on that host), the attacker can trade it at the public POST /api/auth/exchange endpoint for the victim's access and refresh tokens. Fixed in 4.7.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:30 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79661 (GCVE-0-2026-79661)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 11:33
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Unauthenticated fav_count Modification
Summary
Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endpoint on the public router group without authentication or rate limiting. Unauthenticated attackers can increment the fav_count counter of any echo (including private echoes) by supplying its UUID, which can be harvested from the public GET /api/echo/page feed. Repeated requests are accepted without deduplication, each triggering a database write and a four-key cache invalidation, allowing attackers to inflate popularity metrics and amplify load on the database and cache. Fixed in 4.7.3.
Severity
6.5 (Medium)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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CVE-2026-79660 (GCVE-0-2026-79660)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 15:32
VLAI
EPSS
VEX
Title
Ech0 before 4.7.3 Email Disclosure via Public API
Summary
Ech0 versions before 4.7.3 expose guest commenter email addresses through public API endpoints due to improper JSON serialization tags on the Comment model. Unauthenticated attackers can harvest all commenter emails by calling the /api/comments and /api/comments/public endpoints without authentication.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:32 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lin-snow/Ech0/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/ech0-before-… | third-party-advisory |
Impacted products
Date Public
2026-05-03 00:00
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