Vulnerability in Chamilo LMS Learning Management System Allows Unauthorized File Modification
CVE-2026-33698

9.3CRITICAL

Key Information:

Vendor

Chamilo

Status
Chamilo-lms
Vendor
CVE Published:
10 April 2026

What is CVE-2026-33698?

Chamilo LMS, a popular learning management system, is susceptible to a file modification vulnerability that occurs when the 'main/install/' directory remains present and accessible. This issue allows an unauthenticated attacker to execute a chained attack, enabling them to bypass existing security measures and modify files or create new ones as permitted by system permissions. The vulnerability is mitigated in version 1.11.38, making it essential for users to update to this version to safeguard their systems.

Affected Version(s)

chamilo-lms < 1.11.38

References

https://github.com/chamilo/chamilo-lms/security/advisorie...
x_refsource_CONFIRM
https://github.com/chamilo/chamilo-lms/commit/d3355d7873c...
x_refsource_MISC

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.