CVE-2026-33737: CWE-611: Improper Restriction of XML External Entity Reference in chamilo chamilo-lms
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, multiple files use simplexml_load_string() without XXE protection. With LIBXML_NOENT flag, arbitrary server files can be read. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
AI Analysis
Technical Summary
Chamilo LMS contains an improper restriction of XML external entity references (CWE-611) in versions before 1.11.38 and between 2.0.0-alpha.1 and 2.0.0-RC.3. The issue arises from the use of simplexml_load_string() with the LIBXML_NOENT flag enabled, which allows XML external entities to be processed and arbitrary server files to be read. This vulnerability is fixed in Chamilo LMS versions 1.11.38 and 2.0.0-RC.3.
Potential Impact
An attacker can exploit this vulnerability to read arbitrary files on the server hosting Chamilo LMS, potentially exposing sensitive information. The vulnerability does not allow for code execution or denial of service but compromises confidentiality. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade Chamilo LMS to version 1.11.38 or later, or to version 2.0.0-RC.3 or later, where this vulnerability has been fixed. Patch status is confirmed by the vendor's versioning information. No additional mitigations are indicated by the vendor advisory.
CVE-2026-33737: CWE-611: Improper Restriction of XML External Entity Reference in chamilo chamilo-lms
Description
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, multiple files use simplexml_load_string() without XXE protection. With LIBXML_NOENT flag, arbitrary server files can be read. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Chamilo LMS contains an improper restriction of XML external entity references (CWE-611) in versions before 1.11.38 and between 2.0.0-alpha.1 and 2.0.0-RC.3. The issue arises from the use of simplexml_load_string() with the LIBXML_NOENT flag enabled, which allows XML external entities to be processed and arbitrary server files to be read. This vulnerability is fixed in Chamilo LMS versions 1.11.38 and 2.0.0-RC.3.
Potential Impact
An attacker can exploit this vulnerability to read arbitrary files on the server hosting Chamilo LMS, potentially exposing sensitive information. The vulnerability does not allow for code execution or denial of service but compromises confidentiality. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade Chamilo LMS to version 1.11.38 or later, or to version 2.0.0-RC.3 or later, where this vulnerability has been fixed. Patch status is confirmed by the vendor's versioning information. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-23T17:34:57.561Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d94d8f1cc7ad14dae0faf9
Added to database: 4/10/2026, 7:20:47 PM
Last enriched: 4/18/2026, 2:34:09 PM
Last updated: 5/26/2026, 1:41:36 AM
Views: 59
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