Chamilo LMS Critical IDOR: Any Authenticated User Can Extract All Users’ Personal Data and API Tokens
Priority LOW 36CWE-639Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00181 7th percentileScored 2026-11-07
Fix Fixed chamilo-lms (chamilo): 2.0.0-RC.3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| chamilo | chamilo-lms | before 2.0.0-RC.3 | 2.0.0-RC.3 | Patch available | CNA |
- chamilo-lms Vendorchamilo Affected before 2.0.0-RC.3 Fixed in 2.0.0-RC.3 Patch available CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1:*:*:*:*:*:* | 2.0.0 alpha1 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2:*:*:*:*:*:* | 2.0.0 alpha2 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3:*:*:*:*:*:* | 2.0.0 alpha3 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4:*:*:*:*:*:* | 2.0.0 alpha4 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5:*:*:*:*:*:* | 2.0.0 alpha5 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1:*:*:*:*:*:* | 2.0.0 beta1 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2:*:*:*:*:*:* | 2.0.0 beta2 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3:*:*:*:*:*:* | 2.0.0 beta3 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1:*:*:*:*:*:* | 2.0.0 rc1 | Vulnerable | chamilo |
| cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2:*:*:*:*:*:* | 2.0.0 rc2 | Vulnerable | chamilo |
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1:*:*:*:*:*:* Versions 2.0.0 alpha1 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2:*:*:*:*:*:* Versions 2.0.0 alpha2 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3:*:*:*:*:*:* Versions 2.0.0 alpha3 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4:*:*:*:*:*:* Versions 2.0.0 alpha4 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5:*:*:*:*:*:* Versions 2.0.0 alpha5 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1:*:*:*:*:*:* Versions 2.0.0 beta1 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2:*:*:*:*:*:* Versions 2.0.0 beta2 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3:*:*:*:*:*:* Versions 2.0.0 beta3 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1:*:*:*:*:*:* Versions 2.0.0 rc1 Vulnerable ·chamilo
- cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2:*:*:*:*:*:* Versions 2.0.0 rc2 Vulnerable ·chamilo
Remediation
- Fix · CNA chamilo-lms (chamilo) Fixed in 2.0.0-RC.3
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33703
References
More Chamilo Lms vulnerabilities
- TI-2025-32070 Chamilo: Evaluation of untrusted user input leads to Remote Code Execution CVSS 3.1CRITICAL 9.8
- TI-2025-32081 Deserialization of untrusted data in chamilo-lms CVSS 4.0HIGH 8.8
- TI-2024-32140 Chamilo: Post-Auth Remote Code Execution CVSS 4.0HIGH 8.7
- TI-2023-03907 Chamilo LMS Unauthenticated Big Upload File Remote Code Execution CVSS 3.1HIGH 8.1
- TI-2025-32595 Chamilo: Stored XSS Vulnerability via CSV User Import CVSS 3.1HIGH 8.8
- TI-2024-20321 Chamilo LMS 1.11.26 is vulnerable to Incorrect Access Control via main/auth/profile. CVSS 3.1HIGH 8.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences