Stored XSS Vulnerability in Chamilo Learning Management System
CVE-2025-55289

8.8HIGH

Key Information:

Vendor

Chamilo

Status
Chamilo-lms
Vendor
CVE Published:
6 March 2026

What is CVE-2025-55289?

Chamilo LMS prior to version 1.11.34 is susceptible to a stored Cross-Site Scripting (XSS) vulnerability. This flaw allows attackers to inject arbitrary JavaScript code into the platform's social network and internal messaging features. When an authenticated user, including administrators, views this content, the injected payload executes within their browser, enabling potential full account takeover. Attackers can hijack sessions, perform unauthorized actions with user privileges, access sensitive data, and create pathways for propagating attacks to other users. To mitigate this issue, users are advised to upgrade to Chamilo LMS version 1.11.34.

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Deploy the Patch

Affected Version(s)

chamilo-lms < 1.11.34

References

https://github.com/chamilo/chamilo-lms/security/advisorie...
x_refsource_CONFIRM
https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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