Open redirect in Chamilo LMS - CVE-2026-61602
Published: August 4, 2026
Vulnerability identifier: #VU140915
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-61602
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to redirect victims to attacker-controlled sites.
The vulnerability exists due to improper input validation in main/calendar/ical_export.php when handling error paths that issue redirects based on the HTTP_REFERER header. A remote user can supply a crafted referer value to redirect victims to attacker-controlled sites.
The issue is usable for phishing and redirect chaining.
Affected software
Chamilo LMS
How to mitigate CVE-2026-61602
Install security update from vendor's website.
Chamilo LMS - addressed in versions 1.11.40, 2.0.3