Medium severity · published Mar 6, 2026
CVE-2025-59540
Chamilo: Stored Cross-Site Scripting (XSS) in Chamilo LMS Exercise Feedback
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
Chamilo is a learning management system. Prior to version 1.11.34, a stored XSS vulnerability exists in Chamilo LMS that allows a staff account to execute arbitrary JavaScript in the browser of higher-privileged admin users. The issue arises because feedback input in the exercise history page is not properly encoded before rendering, allowing malicious scripts to persist in the database and execute on view. This issue has been patched in version 1.11.34.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
chamilo-lms · chamilo
< 1.11.34 · source: vendor
CL
Chamilo Lms · Chamilo
before 1.11.34 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59540
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-59540
Product
https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34
Vendor Advisory
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-59h4-34mx-m67m
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