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Vulnerability · Published Jul 2, 2021 · Assigned by mitre

CVE-2021-35197

High 7.5

In plain English

A high-severity security flaw in the mediawiki package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.9% (higher than 80% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.9%top 19.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12mediawiki1:1.35.3-1DEBIAN-CVE-2021-35197
Debian:13mediawiki1:1.35.3-1DEBIAN-CVE-2021-35197
Debian:14mediawiki1:1.35.3-1DEBIAN-CVE-2021-35197
Ubuntu:25.10mediawikino fix listedUBUNTU-CVE-2021-35197
Ubuntu:26.04:LTSmediawikino fix listedUBUNTU-CVE-2021-35197
Ubuntu:26.10mediawikino fix listedUBUNTU-CVE-2021-35197

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References