---
id: "CVE-2026-45146"
kind: "vulnerability"
aliases: ["CVE-2026-45146"]
title: "Chamilo LMS: admin search parameter lets SQL injection read and change data"
severity: "high"
cvss: 7.2
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["chamilo-lms", "mysql", "package", "php", "self-hosted"]
not_affected_if: ["managed-hosting", "patched-version"]
published_at: "2026-11-03T20:18:13+00:00"
first_seen_at: "2026-11-03T20:49:22+00:00"
updated_at: "2026-11-03T20:50:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45146", "first_seen_at": "2026-11-03T20:49:22+00:00"}]
---

# Chamilo LMS: admin search parameter lets SQL injection read and change data

Chamilo LMS, an open-source learning management system, fails to restrict the groupOp field of the get_sessions AJAX search filter to AND or OR, so its SQL is built from attacker text. An authenticated administrator can use blind or time-based SQL injection to read user, course and password-reset data, change or delete records, or slow the database down.

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

## How to check

- Check the installed Chamilo version; the sources list `1.11.40` and `2.0.1` as the fixed releases.
- Confirm whether the `main/inc/ajax/model.ajax.php` file exposes the `get_sessions` action on your install.

## Fix

- Move Chamilo LMS 1.11.x installs to `1.11.40`.
- Move Chamilo LMS 2.0.x installs to `2.0.1`.

## Timeline

- 2026-11-03T20:49:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-45146

## Documents

- [advisory] Vendor advisory: github.com https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-prqp-8x29-cr88
- [fix] Patch: github.com https://github.com/chamilo/chamilo-lms/commit/4472f3089bbbca1b4713bfd7059907676b80d07f
- [fix] Patch: github.com https://github.com/chamilo/chamilo-lms/commit/7cc961d60ac27eaccd6bcc8db201de2c65adfdf3
- [fix] Release notes: github.com https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.40
- [fix] Release notes: github.com https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.1

## From the sources

Chamilo LMS is an open-source learning management system. Prior to 1.11.40 and 2.0.1, an authenticated administrator can call the get_sessions action in /main/inc/ajax/model.ajax.php with _search=true and a crafted JSON filters parameter whose groupOp field contains SQL syntax. Because groupOp is not restricted to the expected AND or OR operators before it is incorporated into query logic, attacker-controlled input is interpreted by the database and enables blind or time-based SQL injection. Successful exploitation can disclose sensitive user, course, session, configuration, password-reset, and administrative data, modify or delete records subject to database privileges, and cause denial of service through expensive delayed queries. This issue is fixed in versions 1.11.40 and 2.0.1.

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