CVE-2026-33737: CWE-611: Improper Restriction of XML External Entity Reference in chamilo chamilo-lms
Chamilo LMS versions prior to 1. 11. 38 and between 2. 0. 0-alpha. 1 and before 2. 0. 0-RC. 3 contain an XML External Entity (XXE) vulnerability due to improper restriction when using simplexml_load_string() with the LIBXML_NOENT flag. This flaw allows an attacker to read arbitrary server files.
AI Analysis
Technical Summary
Chamilo LMS, a learning management system, improperly handles XML input in multiple files by using simplexml_load_string() without adequate protection against XML External Entity (XXE) attacks. Specifically, the use of the LIBXML_NOENT flag enables resolution of external entities, which can be exploited to read arbitrary files on the server. This vulnerability affects versions prior to 1.11.38 and versions from 2.0.0-alpha.1 up to but not including 2.0.0-RC.3. The issue is addressed in Chamilo LMS versions 1.11.38 and 2.0.0-RC.3.
Potential Impact
Successful exploitation allows an attacker with low privileges and no user interaction to read sensitive files on the server hosting Chamilo LMS, potentially exposing confidential information. The vulnerability does not impact integrity or availability but has a high confidentiality impact. There are no known exploits 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 other mitigation is indicated.
CVE-2026-33737: CWE-611: Improper Restriction of XML External Entity Reference in chamilo chamilo-lms
Description
Chamilo LMS versions prior to 1. 11. 38 and between 2. 0. 0-alpha. 1 and before 2. 0. 0-RC. 3 contain an XML External Entity (XXE) vulnerability due to improper restriction when using simplexml_load_string() with the LIBXML_NOENT flag. This flaw allows an attacker to read arbitrary server files.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Chamilo LMS, a learning management system, improperly handles XML input in multiple files by using simplexml_load_string() without adequate protection against XML External Entity (XXE) attacks. Specifically, the use of the LIBXML_NOENT flag enables resolution of external entities, which can be exploited to read arbitrary files on the server. This vulnerability affects versions prior to 1.11.38 and versions from 2.0.0-alpha.1 up to but not including 2.0.0-RC.3. The issue is addressed in Chamilo LMS versions 1.11.38 and 2.0.0-RC.3.
Potential Impact
Successful exploitation allows an attacker with low privileges and no user interaction to read sensitive files on the server hosting Chamilo LMS, potentially exposing confidential information. The vulnerability does not impact integrity or availability but has a high confidentiality impact. There are no known exploits 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 other mitigation is indicated.
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: 4/10/2026, 7:35:59 PM
Last updated: 4/10/2026, 9:07:58 PM
Views: 4
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