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Chamilo LMS CVE-2026-33737

| EUVD-2026-21569 MEDIUM
Improper Restriction of XML External Entity Reference (CWE-611)
2026-04-10 security-advisories@github.com
XXE
5.3
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Patch available
Apr 16, 2026 - 05:29 EUVD
2.0.0-RC.3,1.11.38
EUVD ID Assigned
Apr 10, 2026 - 19:22 euvd
EUVD-2026-21569
Analysis Generated
Apr 10, 2026 - 19:22 vuln.today
CVE Published
Apr 10, 2026 - 19:16 nvd
MEDIUM 5.3

DescriptionNVD

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.

AnalysisAI

Chamilo LMS versions prior to 1.11.38 and 2.0.0-RC.3 allow authenticated attackers to read arbitrary server files through XML External Entity (XXE) injection via improper use of simplexml_load_string() with the LIBXML_NOENT flag enabled across multiple application files. The vulnerability requires low-privilege authentication and medium attack complexity but grants high confidentiality impact with no integrity or availability impact; no public exploit code or active exploitation has been identified at the time of analysis.

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CVE-2026-33737 vulnerability details – vuln.today
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