CVE-2026-39878

Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This has been patched in 1.11.40.

CVSS 3.1

9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-79

Published

2026-07-20

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

References

• https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-gcjp-f7jm-rrrg
• https://vokecyber.com/research/cve-2026-39878-chamilo-lms-stored-xss

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