PT-2022-19933 · Mediawiki · Mediawiki Css Extension

Bawolff + 1 · Published 2022-05-02 · Updated 2022-05-09 · CVE-2022-29969

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions MediaWiki RSS extension versions prior to 2022-04-29

Description The issue allows XSS via an rss element if the feed is in $wgRSSUrlWhitelist and $wgRSSAllowLinkTag is true.

Recommendations For versions prior to 2022-04-29, update to a version released after 2022-04-29 to resolve the issue. As a temporary workaround, consider setting $wgRSSAllowLinkTag to false to minimize the risk of exploitation. Restrict access to feeds not in $wgRSSUrlWhitelist to further reduce the risk.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2022-29969

Affected Products

Mediawiki Css Extension

References · 9

• 🔥 https://phabricator.wikimedia.org/T307028 · Exploit
• https://gerrit.wikimedia.org/r/c/787807 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-29969 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-29969 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-29969 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-29969 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-29969 · Security Note
• https://t.me/cvenotify/29540 · Telegram Post
• https://t.me/cibsecurity/41720 · Telegram Post