TI-2026-78771 Aliases CVE-2026-114390 GHSA-h28r-m2q7-jx9p

Missing authorization in Chamilo LMS AJAX handlers exposes learner data

LOW 36CWE-862Published 2026-10-21 · Updated 2026-10-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Chamilo LMS from 2.0.0-alpha.1 before 2.0.0-RC.3 contains a missing authorization flaw (CWE-862) in legacy AJAX handlers under public/main/inc/ajax/. Unauthenticated or low-privileged users can call actions such as export_all_certificates to harvest user names and other learners' certificate PDFs. The attack requires no user interaction and has low complexity.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00227 13th percentileScored 2026-11-07

Fix Fixed chamilo-lms (chamilo): 2.0.0-RC.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
chamilo	chamilo-lms	2.0.0-alpha.1 to before 2.0.0-RC.3	2.0.0-RC.3	Patch available	CNA

chamilo-lms Vendorchamilo Affected 2.0.0-alpha.1 to before 2.0.0-RC.3 Fixed in 2.0.0-RC.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:chamilo:chamilo_lms::::::::	—	—	chamilo

cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:* Versions — — ·chamilo

Remediation

Upgrade chamilo-lms to 2.0.0-RC.3 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA chamilo-lms (chamilo) Fixed in 2.0.0-RC.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-21
chamilo-lms 2.0.0-RC.3
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-78769 Chamilo LMS missing authorization lets attackers change course certificatesPriority LOW 36
- TI-2026-78770 Chamilo LMS open answer grading lets users grade others' examsPriority LOW 24
Show all 3 records →

Timeline

2026-10-21 Threatist record created from CVE-2026-114390
2026-10-21 CISA SSVC decision points changed
2026-10-21 Priority changed: MEDIUM → LOW
2026-10-21 Alias added: GHSA-h28r-m2q7-jx9p

References

Patch 1

https://github.com/chamilo/chamilo-lms/commit/2861afd4896ff898a950302f2c00f44726fa6f0a

Other 5

TI-2023-17452 A command injection vulnerability in the wsConvertPpt component of Chamilo v1.11.* up to… CVSS 3.1CRITICAL 9.8
TI-2023-03150 Chamilo LMS Unauthenticated Command Injection CVSS 3.1CRITICAL 9.8
TI-2025-32070 Chamilo: Evaluation of untrusted user input leads to Remote Code Execution CVSS 3.1CRITICAL 9.8
TI-2025-32081 Deserialization of untrusted data in chamilo-lms CVSS 4.0HIGH 8.8
TI-2024-32140 Chamilo: Post-Auth Remote Code Execution CVSS 4.0HIGH 8.7
TI-2023-03907 Chamilo LMS Unauthenticated Big Upload File Remote Code Execution CVSS 3.1HIGH 8.1

See all 162 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences