CVE-2026-39878
Critical
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.
SeverityCritical
CVSS9.3
Exploit probability—
Product
Chamilo-lms
PublishedJul 20, 2026
First seenJul 20, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| chamilo chamilo-lms | <= 1.11.38 | — |
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