What’s Vulnerable › Vulnerabilities

CVE-2026-114389: Chamilo LMS 2.0.0-alpha.4 before 2.0.0-RC.3 Missing Authorization via openAnswerGrade

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% 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-639

Description

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.

Affected products

• chamilo-lms: from 2.0.0-alpha.4 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/src/CoreBundle/Controller/AiController.php#L525-L703
• 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.4-before-2.0.0-rc.3-missing-authorization-via-openanswergrade

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