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Vulnerability · Published Apr 6, 2021 · Assigned by mitre

CVE-2021-30158

Medium 5.3

In plain English

A medium-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 1.7% (higher than 78% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.3Medium
Exploit odds (30 days)1.7%top 22.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Blocked users are unable to use Special:ResetTokens. This has security relevance because a blocked user might have accidentally shared a token, or might know that a token has been compromised, and yet is not able to block any potential future use of the token by an unauthorized party.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12mediawiki1:1.35.2-1DEBIAN-CVE-2021-30158
Debian:13mediawiki1:1.35.2-1DEBIAN-CVE-2021-30158
Debian:14mediawiki1:1.35.2-1DEBIAN-CVE-2021-30158
Ubuntu:25.10mediawikino fix listedUBUNTU-CVE-2021-30158
Ubuntu:26.04:LTSmediawikino fix listedUBUNTU-CVE-2021-30158
Ubuntu:26.10mediawikino fix listedUBUNTU-CVE-2021-30158

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References