Name: CVE-2021-30157: Improper Neutralization of Input During Web Page Generation
Creator: Rapid7
Published: 2021-04-06T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-30157, CWE-79, CVSS 6.1, EPSS 0.01406

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. On ChangesList special pages such as Special:RecentChanges and Special:Watchlist, some of the rcfilters-filter-* label messages are output in HTML unescaped, leading to XSS.

CVSS Details

CVSS 3.1 Base Score: 6.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade mediawiki	Apr 12, 2021	Apr 6, 2021
Gentoo Linux	—	Upgrade www-apps/mediawiki.	Jul 19, 2021	Apr 6, 2021
Mediawiki	—	Upgrade MediaWiki to the latest version	Apr 12, 2021	Apr 6, 2021
Ubuntu	—	No solution exists	Jun 26, 2025	Apr 6, 2021

Prioritise with Active Threat Intelligence

With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.

Explore Intelligence Hub

MDR Buyer's Guide

Global Threat Landscape Report

Grow your business

CVSS Details

Covered by Rapid7

Prioritise with Active Threat Intelligence