CWE-639
Authorization Bypass Through User-Controlled Key
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-33663 (GCVE-0-2026-33663)
Vulnerability from cvelistv5 – Published: 2026-03-25 17:11 – Updated: 2026-03-25 18:06
VLAI
Title
n8n Vulnerable to Credential Theft via Name-Based Resolution and Permission Checker Bypass in Community Edition
Summary
n8n is an open source workflow automation platform. Prior to versions 2.14.1, 2.13.3, and 1.123.27, an authenticated user with the `global:member` role could exploit chained authorization flaws in n8n's credential pipeline to steal plaintext secrets from generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) belonging to other users on the same instance. The attack abuses a name-based credential resolution path that does not enforce ownership or project scope, combined with a bypass in the credentials permission checker that causes generic HTTP credential types to be skipped during pre-execution validation. Together, these flaws allow a member-role user to resolve another user's credential ID and execute a workflow that decrypts and uses that credential without authorization. Native integration credential types (e.g. `slackApi`, `openAiApi`, `postgres`) are not affected by this issue. This vulnerability affects Community Edition only. Enterprise Edition has additional permission gates on workflow creation and execution that independently block this attack chain. The issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Restrict instance access to fully trusted users only, and/or audit credentials stored on the instance and rotate any generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) that may have been exposed. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Severity
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-33678 (GCVE-0-2026-33678)
Vulnerability from cvelistv5 – Published: 2026-03-24 15:44 – Updated: 2026-03-24 17:04
VLAI
Title
Vikunja has IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion
Summary
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, `TaskAttachment.ReadOne()` queries attachments by ID only (`WHERE id = ?`), ignoring the task ID from the URL path. The permission check in `CanRead()` validates access to the task specified in the URL, but `ReadOne()` loads a different attachment that may belong to a task in another project. This allows any authenticated user to download or delete any attachment in the system by providing their own accessible task ID with a target attachment ID. Attachment IDs are sequential integers, making enumeration trivial. Version 2.2.1 patches the issue.
Severity
8.1 (High)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | x_refsource_CONFIRM |
| https://vikunja.io/changelog/vikunja-v2.2.2-was-r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
< 2.2.1
|
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CVE-2026-33700 (GCVE-0-2026-33700)
Vulnerability from cvelistv5 – Published: 2026-03-24 15:51 – Updated: 2026-03-24 18:04
VLAI
Title
Vikunja has a Link Share Delete IDOR — Missing Project Ownership Check Allows Cross-Project Link Share Deletion
Summary
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DELETE /api/v1/projects/:project/shares/:share` endpoint does not verify that the link share belongs to the project specified in the URL. An attacker with admin access to any project can delete link shares from other projects by providing their own project ID combined with the target share ID. Version 2.2.1 patches the issue.
Severity
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | x_refsource_CONFIRM |
| https://vikunja.io/changelog/vikunja-v2.2.2-was-r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
< 2.2.1
|
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CVE-2026-33702 (GCVE-0-2026-33702)
Vulnerability from cvelistv5 – Published: 2026-04-10 18:15 – Updated: 2026-04-13 15:36
VLAI
Title
Chamilo LMS has an Insecure Direct Object Reference (IDOR)
Summary
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, Chamilo LMS contains an Insecure Direct Object Reference (IDOR) vulnerability in the Learning Path progress saving endpoint. The file lp_ajax_save_item.php accepts a uid (user ID) parameter directly from $_REQUEST and uses it to load and modify another user's Learning Path progress — including score, status, completion, and time — without verifying that the requesting user matches the target user ID. Any authenticated user enrolled in a course can overwrite another user's Learning Path progress by simply changing the uid parameter in the request. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
Severity
7.1 (High)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/chamilo/chamilo-lms/security/a… | x_refsource_CONFIRM |
| https://github.com/chamilo/chamilo-lms/commit/633… | x_refsource_MISC |
| https://github.com/chamilo/chamilo-lms/commit/bf3… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| chamilo | chamilo-lms |
Affected:
< 1.11.38
Affected: >= 2.0.0-alpha.1, < 2.0.0-RC.3 |
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CVE-2026-33703 (GCVE-0-2026-33703)
Vulnerability from cvelistv5 – Published: 2026-04-10 18:23 – Updated: 2026-04-14 14:05
VLAI
Title
Chamilo LMS Critical IDOR: Any Authenticated User Can Extract All Users’ Personal Data and API Tokens
Summary
Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, an Insecure Direct Object Reference (IDOR) vulnerability in the /social-network/personal-data/{userId} endpoint allows any authenticated user to access full personal data and API tokens of arbitrary users by modifying the userId parameter. This results in mass disclosure of sensitive user information and credentials, enabling a full platform data breach. This vulnerability is fixed in 2.0.0-RC.3.
Severity
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/chamilo/chamilo-lms/security/a… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| chamilo | chamilo-lms |
Affected:
< 2.0.0-RC.3
|
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CVE-2026-3371 (GCVE-0-2026-3371)
Vulnerability from cvelistv5 – Published: 2026-04-11 01:25 – Updated: 2026-04-13 15:15
VLAI
Title
Tutor LMS <= 3.9.7 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Course Content Modification
Summary
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.9.7. This is due to missing authorization checks in the `save_course_content_order()` private method, which is called unconditionally by the `tutor_update_course_content_order` AJAX handler. While the handler's `content_parent` branch includes a `can_user_manage()` check, the `save_course_content_order()` call processes attacker-supplied `tutor_topics_lessons_sorting` JSON without any ownership or capability verification. This makes it possible for authenticated attackers with Subscriber-level access or above to detach lessons from topics, reorder course content, and reassign lessons between topics in any course, including admin-owned courses, by sending a crafted AJAX request with manipulated topic and lesson IDs.
Severity
4.3 (Medium)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| themeum | Tutor LMS – eLearning and online course solution |
Affected:
0 , ≤ 3.9.7
(semver)
|
Credits
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CVE-2026-33724 (GCVE-0-2026-33724)
Vulnerability from cvelistv5 – Published: 2026-03-25 18:26 – Updated: 2026-03-25 20:06
VLAI
Title
n8n's Source Control SSH Configuration Uses StrictHostKeyChecking=no
Summary
n8n is an open source workflow automation platform. Prior to version 2.5.0, when the Source Control feature is configured to use SSH, the SSH command used for git operations explicitly disabled host key verification. A network attacker positioned between the n8n instance and the remote Git server could intercept the connection and present a fraudulent host key, potentially injecting malicious content into workflows or intercepting repository data. This issue only affects instances where the Source Control feature has been explicitly enabled and configured to use SSH (non-default). The issue has been fixed in n8n version 2.5.0. Users should upgrade to this version or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Disable the Source Control feature if it is not actively required, and/or restrict network access to ensure the n8n instance communicates with the Git server only over trusted, controlled network paths. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Severity
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
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CVE-2026-33730 (GCVE-0-2026-33730)
Vulnerability from cvelistv5 – Published: 2026-03-27 00:30 – Updated: 2026-03-27 19:59
VLAI
Title
Open Source Point of Sale has an IDOR in Password Change (Home)
Summary
Open Source Point of Sale (opensourcepos) is a web based point of sale application written in PHP using CodeIgniter framework. Prior to version 3.4.2, an Insecure Direct Object Reference (IDOR) vulnerability allows an authenticated low-privileged user to access the password change functionality of other users, including administrators, by manipulating the `employee_id` parameter. The application does not verify object ownership or enforce authorization checks. Version 3.4.2 adds object-level authorization checks to validate that the current user owns the employee_id being accessed.
Severity
6.5 (Medium)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/opensourcepos/opensourcepos/se… | x_refsource_CONFIRM |
| https://github.com/opensourcepos/opensourcepos/co… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| opensourcepos | opensourcepos |
Affected:
< 3.4.2
|
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CVE-2026-33735 (GCVE-0-2026-33735)
Vulnerability from cvelistv5 – Published: 2026-03-27 00:36 – Updated: 2026-03-27 13:50
VLAI
Title
MyTube has an Improper Access Control that Allows Complete Application Takeover
Summary
MyTube is a self-hosted downloader and player for several video websites Prior to version 1.8.69, an authorization bypass in the `/api/settings/import-database` endpoint allows attackers with low-privilege credentials to upload and replace the application's SQLite database entirely, leading to a full compromise of the application. The bypass is relevant for other POST routes as well. Version 1.8.69 fixes the issue.
Severity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/franklioxygen/MyTube/security/… | x_refsource_CONFIRM |
| https://github.com/franklioxygen/MyTube/commit/b7… | x_refsource_MISC |
| https://github.com/franklioxygen/MyTube/blob/6ade… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| franklioxygen | MyTube |
Affected:
< 1.8.69
|
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"name": "https://github.com/franklioxygen/MyTube/security/advisories/GHSA-63cf-662x-crp2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/franklioxygen/MyTube/security/advisories/GHSA-63cf-662x-crp2"
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{
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"url": "https://github.com/franklioxygen/MyTube/commit/b7bf9b7960958c6c51f85fe50a2fc041a086c466"
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{
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"tags": [
"x_refsource_MISC"
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"url": "https://github.com/franklioxygen/MyTube/blob/6ade838a46366174e2c030f856340f3856e03132/backend/src/middleware/roleBasedSettingsMiddleware.ts#L116"
}
],
"source": {
"advisory": "GHSA-63cf-662x-crp2",
"discovery": "UNKNOWN"
},
"title": "MyTube has an Improper Access Control that Allows Complete Application Takeover"
}
},
"cveMetadata": {
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"cveId": "CVE-2026-33735",
"datePublished": "2026-03-27T00:36:31.489Z",
"dateReserved": "2026-03-23T17:34:57.561Z",
"dateUpdated": "2026-03-27T13:50:13.478Z",
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CVE-2026-33736 (GCVE-0-2026-33736)
Vulnerability from cvelistv5 – Published: 2026-04-10 19:03 – Updated: 2026-04-13 20:55
VLAI
Title
Chamilo LMS has an Insecure Direct Object Reference (IDOR) - User Data Exposure
Summary
Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, any authenticated user (including ROLE_STUDENT) can enumerate all platform users and access personal information (email, phone, roles) via GET /api/users, including administrator accounts. This vulnerability is fixed in 2.0.0-RC.3.
Severity
6.5 (Medium)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/chamilo/chamilo-lms/security/a… | x_refsource_CONFIRM |
| https://github.com/chamilo/chamilo-lms/commit/173… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| chamilo | chamilo-lms |
Affected:
>= 2.0.0-alpha.1, < 2.0.0-RC.3
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-33736",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-13T20:55:38.682772Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-13T20:55:46.727Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "chamilo-lms",
"vendor": "chamilo",
"versions": [
{
"status": "affected",
"version": "\u003e= 2.0.0-alpha.1, \u003c 2.0.0-RC.3"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, any authenticated user (including ROLE_STUDENT) can enumerate all platform users and access personal information (email, phone, roles) via GET /api/users, including administrator accounts. This vulnerability is fixed in 2.0.0-RC.3."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "CWE-639: Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-10T19:03:18.638Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-fp2p-fj6c-x3x9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-fp2p-fj6c-x3x9"
},
{
"name": "https://github.com/chamilo/chamilo-lms/commit/1739371ce1c562c007c7f5d53e6d65b7a4ff4109",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/chamilo/chamilo-lms/commit/1739371ce1c562c007c7f5d53e6d65b7a4ff4109"
}
],
"source": {
"advisory": "GHSA-fp2p-fj6c-x3x9",
"discovery": "UNKNOWN"
},
"title": "Chamilo LMS has an Insecure Direct Object Reference (IDOR) - User Data Exposure"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-33736",
"datePublished": "2026-04-10T19:03:18.638Z",
"dateReserved": "2026-03-23T17:34:57.561Z",
"dateUpdated": "2026-04-13T20:55:46.727Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation
Phase: Architecture and Design
Description:
- For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Mitigation
Phases: Architecture and Design, Implementation
Description:
- Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
Mitigation
Phase: Architecture and Design
Description:
- Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
No CAPEC attack patterns related to this CWE.