CVE-2026-39878

CRITICAL CVSS 3.1: 9.3 EPSS 0.43%
Updated Aug 21, 2026
Chamilo
Parameter Value
CVSS 9.3 (CRITICAL)
Fixed In 1.11.40
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Chamilo
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1