---
id: "CVE-2026-114389"
kind: "vulnerability"
aliases: ["CVE-2026-114389"]
title: "Chamilo LMS: missing authorization lets students read others' exam grades"
severity: "medium"
cvss: 5.3
epss: 0.00274
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["chamilo-lms", "education", "package", "php", "self-hosted"]
not_affected_if: ["default-config"]
published_at: "2026-10-21T13:18:29+00:00"
first_seen_at: "2026-10-23T21:57:28+00:00"
updated_at: "2026-10-25T04:20:57+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114389", "first_seen_at": "2026-10-23T21:57:28+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114389", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# Chamilo LMS: missing authorization lets students read others' exam grades

Chamilo LMS from 2.0.0-alpha.4 before 2.0.0-RC.3 has a missing authorization check in the AI open-answer grading endpoint. Any logged-in user can request AI grading of other students' exam attempts, exposing their answers through the feedback and consuming AI quota.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Chamilo version in the platform admin panel or `version.php`, or `unknown` if the sources do not say where to read it
- Confirm whether the AI grading feature is enabled and reachable by students

## Fix

- Upgrade Chamilo LMS to `2.0.0-RC.3` or later
- Until upgraded, restrict or disable the AI open-answer grading feature for student roles

## Timeline

- 2026-10-23T21:57:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114389
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114389

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_