CVE-2026-39878

Published Jul 20, 2026

Last updated 2 days ago

CVSS critical 9.3
lms

Overview

Description
Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This has been patched in 1.11.40.
Source
security-advisories@github.com
NVD status
Deferred

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.3
Impact score
5.8
Exploitability score
2.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Severity
CRITICAL

Weaknesses

security-advisories@github.com
CWE-79

Social media

Hype score
Not currently trending

Related CVEs

  1. Unauthenticated Arbitrary File Upload in Masteriyo - LMS <= 2.3.2 versions.•CVE-2026-73996
  2. An unrestricted SCORM file upload vulnerability in Koollab LMS allowed an authenticated module designer to upload a SCORM package containing a PHP webshell to a publicly accessible directory and execute arbitrary code on the server.•CVE-2026-63227
  3. Chamilo version 1.11.40 and earlier are vulnerable to authenticated remote code execution in the main/inc/ajax/lang.ajax.php path. This endpoint is protected only by `api_protect_course_script(true)`, which means any authenticated user enrolled in a course (student, teacher, DRH) can reach it.•CVE-2026-34239
  4. Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability•CVE-2026-56164
  5. Unauthenticated Cross Site Scripting (XSS) in LMS <= 9.7 versions.•CVE-2026-27404

References

Sources include official advisories and independent security research.