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OpenAdvisories
Critical · 9.3 CVE-2026-39878 EUVD-2026-46038

Chamilo stored XSS via user registration leads to admin account takeover

Published Jul 20, 2026 · Updated Aug 21, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
chamilo chamilo-lms <= 1.11.38 —

References