What’s Vulnerable › Vulnerabilities

CVE-2021-41118: ReDoS in DynamicPageList3

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-04 · updated 2026-06-17
• Weakness: CWE-400

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.

Affected products

• Universal-Omega DynamicPageList3: before 3.3.6 — fixed in 3.3.6

How to fix

Upgrade to a fixed version: Universal-Omega DynamicPageList3 3.3.6. Check the vendor advisory for mitigations.

References

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

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