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TI-2026-78770 Aliases CVE-2026-114389GHSA-f6m7-pgw8-2v88

Chamilo LMS open answer grading lets users grade others' exams

Priority LOW 24CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
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-639.

Summary

Chamilo LMS from 2.0.0-alpha.4 before 2.0.0-RC.3 has a missing authorization check (CWE-639) in AiController::openAnswerGrade. Any authenticated user can obtain AI grading of other students' exam attempts by supplying exeId and questionId values, exposing their answers through feedback and consuming AI quota.

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

Description from the CNA

Chamilo LMS from 2.0.0-alpha.4 before 2.0.0-RC.3 contains a missing authorization vulnerability in AiController::openAnswerGrade that allows any authenticated user to obtain AI grading of other students' exam attempts. Attackers can enumerate exeId and questionId values sent to the open_answer_grade endpoint to expose other students' answers through feedback and consume AI quota.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00274 19th 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
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
chamilochamilo-lms2.0.0-alpha.4 to before 2.0.0-RC.32.0.0-RC.3Patch availableCNA
  • chamilo-lms Vendorchamilo Affected 2.0.0-alpha.4 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.

CPEVersionsRoleVendor
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, 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 ·

    chamilo-lms 2.0.0-RC.3

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-78771 Missing authorization in Chamilo LMS AJAX handlers exposes learner dataPriority LOW 36
    • TI-2026-78769 Chamilo LMS missing authorization lets attackers change course certificatesPriority LOW 36
    Show all 3 records →

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-114389
  2. 2026-10-21 CISA SSVC decision points changed
  3. 2026-10-21 Alias added: GHSA-f6m7-pgw8-2v88

References

Patch 1

Other 3

  • 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