PT-2020-6809 · Mediawiki+1 · Mediawiki+1

Published 2020-09-24 · Updated 2024-03-06 · CVE-2020-25812

Positive Technologies (AI Summary)

CVSS v2.0

6.4

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions MediaWiki versions 1.34.x through 1.34.3

Description An issue was discovered in MediaWiki where the NS filter on Special:Contributions uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML. The vulnerability exists due to a lack of protection of the web page structure, which can allow a remote attacker to conduct a cross-site scripting (XSS) attack.

Recommendations For MediaWiki versions 1.34.x through 1.34.3, update to version 1.34.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the Special:Contributions page until a patch is available. Additionally, avoid using unescaped messages as keys in the option key for an HTMLForm specifier to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALT-PU-2020-3022

ALT-PU-2020-3055

BDU:2022-07042

BIT-MEDIAWIKI-2020-25812

CVE-2020-25812

DSA-4767-1

GHSA-RJ9P-8JXJ-2CH4

MGASA-2020-0381

Affected Products

Alt Linux

Mediawiki

References · 29

• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25812.yaml · Exploit
• https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-25812 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-25812 · Vendor Advisory
• https://gerrit.wikimedia.org/g/mediawiki/core/+/ad4a3ba45fb955aa8c0eb3c83809b16b40a498b9/includes/specials/SpecialContributions.php#592 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-25812 · Vendor Advisory
• https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0381 · Vendor Advisory
• https://debian.org/security/2020/dsa-4767 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2020-0381.html · Security Note
• https://osv.dev/vulnerability/DSA-4767-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-07042 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-25812 · Vendor Advisory