Missing Authorization in Chamilo LMS - CVE-2026-61530
Published: August 4, 2026
Vulnerability identifier: #VU140930
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-61530
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to modify assignment submission feedback and grading data across course or session boundaries.
The vulnerability exists due to missing authorization in the POST /api/c_student_publication_comments/upload endpoint when handling attacker-controlled submission identifiers. A remote user can send a specially crafted request with an arbitrary submissionId to modify assignment submission feedback and grading data across course or session boundaries.
The issue also allows modification of qualification, qualificator_id, and date_of_qualification fields on the targeted submission.
Affected software
Chamilo LMS
How to mitigate CVE-2026-61530
Install security update from vendor's website.
Chamilo LMS - update to 2.0.3