What’s Vulnerable › Vulnerabilities

CVE-2026-114390: Chamilo LMS 2.0.0-alpha.1 before 2.0.0-RC.3 Missing Authorization in AJAX Handlers

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-21 · updated 2026-10-22
• Weakness: CWE-862

Description

Chamilo LMS from 2.0.0-alpha.1 before 2.0.0-RC.3 contains a missing authorization vulnerability in legacy AJAX handlers under public/main/inc/ajax/ that exposes user names and certificates. Unauthenticated or low-privileged users can call actions like get_users_by_group_course, user_by_all_roles, and export_all_certificates to harvest user names and other learners' certificate PDFs.

Affected products

• chamilo-lms: from 2.0.0-alpha.1 before 2.0.0-RC.3 — fixed in 2.0.0-RC.3

How to fix

Upgrade to a fixed version: chamilo-lms 2.0.0-RC.3. Check the vendor advisory for mitigations.

References

• https://github.com/chamilo/chamilo-lms/blob/v2.0.0-RC.2/public/main/inc/ajax/course.ajax.php#L350-L426
• https://github.com/chamilo/chamilo-lms/blob/v2.0.0-RC.2/public/main/inc/ajax/gradebook.ajax.php#L58-L99
• https://github.com/chamilo/chamilo-lms/blob/v2.0.0-RC.2/public/main/inc/ajax/usergroup.ajax.php#L17-L50
• https://github.com/chamilo/chamilo-lms/commit/2861afd4896ff898a950302f2c00f44726fa6f0a
• https://github.com/chamilo/chamilo-lms/issues/7671
• https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3
• https://www.vulncheck.com/advisories/chamilo-lms-2.0.0-alpha.1-before-2.0.0-rc.3-missing-authorization-in-ajax-handlers

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