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4 vulnerabilities found for User Session Synchronizer by rafasashi
CVE-2026-15341 (GCVE-0-2026-15341)
Vulnerability from nvd – Published: 2026-08-15 02:26 – Updated: 2026-08-17 15:55
VLAI
EPSS
VEX
Title
User Session Synchronizer <= 1.4.0 - Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters
Summary
The User Session Synchronizer plugin for WordPress is vulnerable to Authentication Bypass leading to Account Takeover in all versions up to, and including, 1.4.0. The `synchronize_session()` function, hooked on `init` and therefore executed on every request, performs no nonce, capability, or shared-secret validation against the attacker-supplied `ussync-key`, `ussync-token`, and `ussync-ref` parameters; when `ussync-key` references an unregistered slot, `get_option()` returns `false` for both the secret key and the domain list, causing the AES-256-CBC encryption key to degrade to the fully predictable `md5('')` and the referer allowlist to collapse to an empty-string match, while the AES IV is unconditionally hard-coded as `md5('another-secret')`. This makes it possible for unauthenticated attackers to supply a crafted request encrypting any known or guessable user email address in the `ussync-ref` parameter, causing the handler to call `wp_set_auth_cookie()` for the matched user and granting full authentication as that user — including administrators — with no prior knowledge of site secrets.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 15:55 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| rafasashi | User Session Synchronizer |
Affected:
0 , ≤ 1.4.0
(semver)
|
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CVE-2025-32612 (GCVE-0-2025-32612)
Vulnerability from nvd – Published: 2025-04-09 16:09 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress User Session Synchronizer plugin <= 1.4.0 - CSRF to Stored XSS vulnerability
Summary
Cross-Site Request Forgery (CSRF) vulnerability in rafasashi User Session Synchronizer user-session-synchronizer allows Stored XSS.This issue affects User Session Synchronizer: from n/a through <= 1.4.0.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-09 17:42 UTC
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| rafasashi | User Session Synchronizer |
Affected:
0 , ≤ 1.4.0
(custom)
|
Date Public
2026-04-01 16:38
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CVE-2026-15341 (GCVE-0-2026-15341)
Vulnerability from cvelistv5 – Published: 2026-08-15 02:26 – Updated: 2026-08-17 15:55
VLAI
EPSS
VEX
Title
User Session Synchronizer <= 1.4.0 - Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters
Summary
The User Session Synchronizer plugin for WordPress is vulnerable to Authentication Bypass leading to Account Takeover in all versions up to, and including, 1.4.0. The `synchronize_session()` function, hooked on `init` and therefore executed on every request, performs no nonce, capability, or shared-secret validation against the attacker-supplied `ussync-key`, `ussync-token`, and `ussync-ref` parameters; when `ussync-key` references an unregistered slot, `get_option()` returns `false` for both the secret key and the domain list, causing the AES-256-CBC encryption key to degrade to the fully predictable `md5('')` and the referer allowlist to collapse to an empty-string match, while the AES IV is unconditionally hard-coded as `md5('another-secret')`. This makes it possible for unauthenticated attackers to supply a crafted request encrypting any known or guessable user email address in the `ussync-ref` parameter, causing the handler to call `wp_set_auth_cookie()` for the matched user and granting full authentication as that user — including administrators — with no prior knowledge of site secrets.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 15:55 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| rafasashi | User Session Synchronizer |
Affected:
0 , ≤ 1.4.0
(semver)
|
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CVE-2025-32612 (GCVE-0-2025-32612)
Vulnerability from cvelistv5 – Published: 2025-04-09 16:09 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress User Session Synchronizer plugin <= 1.4.0 - CSRF to Stored XSS vulnerability
Summary
Cross-Site Request Forgery (CSRF) vulnerability in rafasashi User Session Synchronizer user-session-synchronizer allows Stored XSS.This issue affects User Session Synchronizer: from n/a through <= 1.4.0.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-09 17:42 UTC
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| rafasashi | User Session Synchronizer |
Affected:
0 , ≤ 1.4.0
(custom)
|
Date Public
2026-04-01 16:38
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"cveMetadata": {
"assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"assignerShortName": "Patchstack",
"cveId": "CVE-2025-32612",
"datePublished": "2025-04-09T16:09:29.029Z",
"dateReserved": "2025-04-09T11:20:35.409Z",
"dateUpdated": "2026-04-28T16:12:25.315Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}