Medium severity · published Apr 10, 2026
CVE-2026-33737
Chamilo LMS has an XML External Entity (XXE) Injection
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
chamilo-lms · chamilo
< 1.11.38; >= 2.0.0-alpha.1, < 2.0.0-RC.3 · source: vendor
CL
Chamilo Lms · Chamilo
before 1.11.38; 2.0.0; 2.0.0; 2.0.0; 2.0.0; 2.0.0; +5 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33737
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33737
Patch
https://github.com/chamilo/chamilo-lms/commit/22b1cb1c609b643765c88654155aba27070c927e
Patch
https://github.com/chamilo/chamilo-lms/commit/af6b7002af7c15825e98fc522e2ead0d00cacaa3
Vendor Advisory
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-c4ww-qgf2-v89j
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