Vulnerability · Published Apr 6, 2021 · Assigned by mitre
CVE-2021-30157
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 1.4% (higher than 73% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)1.4%top 27.3% 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. On ChangesList special pages such as Special:RecentChanges and Special:Watchlist, some of the rcfilters-filter-* label messages are output in HTML unescaped, leading to XSS.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mediawiki | 1:1.35.2-1 | DEBIAN-CVE-2021-30157 |
| Debian:13 | mediawiki | 1:1.35.2-1 | DEBIAN-CVE-2021-30157 |
| Debian:14 | mediawiki | 1:1.35.2-1 | DEBIAN-CVE-2021-30157 |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2021-30157 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2021-30157 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2021-30157 |
Affected products (as reported)
References
- https://phabricator.wikimedia.org/T278058 x_refsource_MISC
- DSA-4889 vendor-advisory, x_refsource_DEBIAN
- FEDORA-2021-f4223b6684 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-d298103d3a vendor-advisory, x_refsource_FEDORA
- GLSA-202107-40 vendor-advisory, x_refsource_GENTOO