CVE-2020-29003

Name: CVE-2020-29003
Creator: NVD / NIST
Published: 2020-11-24T06:15:12.517+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2020-29003 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.52%

40.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mediawiki	Mediawiki	<= 1.35

References

https://phabricator.wikimedia.org/T266508Exploit, Issue Tracking, Vendor Advisory
https://phabricator.wikimedia.org/T266508Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: Nov 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-29003?

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.

How severe is CVE-2020-29003?

CVE-2020-29003 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2020-29003?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-29003?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST