Chamilo LMS has an XML External Entity (XXE) Injection

published 2026-04-10 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-21569

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 links 2

chamilo chamilo_lms 1.11.38

github.com/chamilo/chamilo-lms@22b1cb1 commit
github.com/chamilo/chamilo-lms@af6b700 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 6 mo ago (2026-04-13)

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

chamilo chamilo-lms

Classification

Weakness

CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

CVE List CVE-2026-33737
NVD CVE-2026-33737

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary