Vulnerability · Published Apr 9, 2021 · Assigned by mitre
CVE-2021-30458
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 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)1.0%top 37.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2. An attacker can send crafted wikitext that Utils/WTUtils.php will transform by using a <meta> tag, bypassing sanitization steps, and potentially allowing for XSS.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mediawiki | 1:1.35.2-1 | DEBIAN-CVE-2021-30458 |
| Debian:13 | mediawiki | 1:1.35.2-1 | DEBIAN-CVE-2021-30458 |
| Debian:14 | mediawiki | 1:1.35.2-1 | DEBIAN-CVE-2021-30458 |
| Packagist | wikimedia/parsoid | 0.12.2 | GHSA-5pqx-77vf-85rw |
| Packagist | wikimedia/parsoid | 0.11.1 | GHSA-5pqx-77vf-85rw |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2021-30458 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2021-30458 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2021-30458 |
Affected products (as reported)
References
- https://phabricator.wikimedia.org/T279451 x_refsource_MISC
- https://www.mediawiki.org/wiki/Parsoid x_refsource_MISC
- GLSA-202107-40 vendor-advisory, x_refsource_GENTOO