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.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 5
- StatusPublished → DeferredNVD modified 2026-10-22 17:40
- StatusReceived → PublishedNVD modified 2026-10-21 15:48
- StatusPublished → ReceivedNVD modified 2026-10-21 16:17
- CVSS5.3 (v4.0, CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N) → 5.3 (v4.0, CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)NVD modified 2026-10-21 16:17
- First seenCVSS 5.3 · chamiloNVD modified 2026-10-21 12:39
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 5
- 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