CVE-2025-55289
criticalpriority · track · 36EPSS 0.003 · 25 %ileEUUSEPSS · scored 2026-10-27
Chamilo is a learning management system. Prior to version 1.11.34, there is a stored XSS vulnerability in Chamilo LMS (Verison 1.11.32) allows an attacker to inject arbitrary JavaScript into the platform’s social network and internal messaging features. When viewed by an authenticated user (including administrators), the payload executes in their browser within the LMS context. This enables full account takeover via session hijacking, unauthorized actions with the victim’s privileges, exfiltration of sensitive data, and potential self-propagation to other users. This issue has been patched in version 1.11.34.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.2–9
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://chamilo.org/en/download/Patchcnnvd
- https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34cnnvd
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-cchj-3qmf-82j5cnnvd
- https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34enisa_euvd
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-cchj-3qmf-82j5enisa_euvd
- https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34ProductRelease Notesnvd
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-cchj-3qmf-82j5Vendor Advisorynvd
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