SB20261109228 - Improper Authorization in Chamilo LMS

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Main Vulnerability Database SB20261109228

SB20261109228 - Improper Authorization in Chamilo LMS

Published: November 9, 2026

Security Bulletin ID SB20261109228
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Authorization (CVE-ID: CVE-2026-61566)

CWE-ID: CWE-285 - Improper Authorization

CVSSv4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a low-privileged authenticated attacker to forge attendance records and delete teacher corrections in courses they do not belong to.

The vulnerability exists due to missing course-level authorization in Chamilo LMS AttendanceController and StudentPublicationController when processing requests containing user-controlled course, attendance, or assignment identifiers. A low-privileged authenticated attacker can change these identifiers to access other courses' student rosters, signatures, and assignment submissions without enrollment or teacher privileges.


Remediation

Install update from vendor's website.

References