CVE-2026-114390 chamilo CVE debrief

Who should care

Defenders responsible for Chamilo LMS instances should assess exposure and prioritize remediation of vulnerable instances. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify exposure and remediate vulnerable instances to version 2.0.0-RC.3 or later.

Why it matters

Chamilo LMS versions 2.0.0-alpha.1 before 2.0.0-RC.3 are vulnerable to missing authorization in AJAX handlers, allowing potential unauthorized access to user information. Defenders should verify exposure and remediate vulnerable instances.

• Potential unauthorized access to user names and certificate information
• Possible exploitation by unauthenticated or low-privileged users
• Requires verification of Chamilo LMS version and exposure
• Remediation priority for vulnerable instances

Technical summary

The vulnerability exists in legacy AJAX handlers under public/main/inc/ajax/ in Chamilo LMS versions 2.0.0-alpha.1 before 2.0.0-RC.3. 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. This could lead to unauthorized access to sensitive information, including user names and certificate information. Defenders should prioritize verifying exposure and remediating vulnerable Chamilo LMS instances.

Defensive priority

Defenders should prioritize verifying exposure and remediating vulnerable Chamilo LMS instances.

Recommended defensive actions

• Verify Chamilo LMS version and exposure
• Remediate vulnerable instances to version 2.0.0-RC.3 or later
• Monitor for unauthorized access attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the missing authorization vulnerability in Chamilo LMS AJAX handlers. The vulnerability exists in legacy AJAX handlers and allows unauthenticated or low-privileged users to 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. Defenders should verify exposure and remediate vulnerable instances to version 2.0.0-RC.3 or later.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.