CVE-2021-44857

MEDIUM

MediaWiki < 1.35.5, 1.36.x < 1.36.3, 1.37.x < 1.37.1 - Arbitrary Page Content Replacement via mcrrestore

Title source: llm
STIX 2.1

Description

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. It is possible to use action=mcrundo followed by action=mcrrestore to replace the content of any arbitrary page (that the user doesn't have edit rights for). This applies to any public wiki, or a private wiki that has at least one page set in $wgWhitelistRead.

References (3)

Core 3

Scores

CVSS v3 6.5
EPSS 0.0015
EPSS Percentile 35.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Details

CWE
CWE-862
Status published
Products (1)
mediawiki/mediawiki < 1.35.5
Published Dec 17, 2021
Tracked Since Feb 18, 2026