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Vulnerability · Published Sep 27, 2020 · Assigned by mitre

CVE-2020-25828

Medium 6.1

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 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)1.1%top 34.5% 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 1.31.10 and 1.32.x through 1.34.x before 1.34.4. The non-jqueryMsg version of mw.message().parse() doesn't escape HTML. This affects both message contents (which are generally safe) and the parameters (which can be based on user input). (When jqueryMsg is loaded, it correctly accepts only whitelisted tags in message contents, and escapes all parameters. Situations with an unloaded jqueryMsg are rare in practice, but can for example occur for Special:SpecialPages on a wiki with no extensions installed.)

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12mediawiki1:1.35.0-1DEBIAN-CVE-2020-25828
Debian:13mediawiki1:1.35.0-1DEBIAN-CVE-2020-25828
Debian:14mediawiki1:1.35.0-1DEBIAN-CVE-2020-25828
Packagistmediawiki/core1.31.9GHSA-h8qx-mj6v-2934
Packagistmediawiki/core1.34.3GHSA-h8qx-mj6v-2934
Packagistmediawiki/core1.35.0GHSA-h8qx-mj6v-2934

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References