CVE-2020-29003

5.4 mediumEPSS 0.5%

Medium (5.4) in mediawiki mediawiki. EPSS 0.5% chance of exploitation in the next 30 days.

The PollNY extension for MediaWiki through 1.35 allows XSS via an answer option for a poll question, entered during Special:CreatePoll or Special:UpdatePoll.

Severity

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2020-11-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mediawiki:mediawiki

References

https://phabricator.wikimedia.org/T266508
https://phabricator.wikimedia.org/T266508

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