CVE-2020-25812
MediaWiki Cross-site Scripting (XSS) vulnerability
6.1
MEDIUM
CVSS 3.1
EPSS 0.37%
Description
An issue was discovered in MediaWiki 1.34.x before 1.34.4. On Special:Contributions, the NS filter uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML.
How to fix CVE-2020-25812
To remediate CVE-2020-25812, upgrade the affected package to a fixed version below.
- —upgrade to 1.34.4 or later
- —upgrade to 1:1.35.0-1 or later
- —upgrade to 1.34.3 or later
Is CVE-2020-25812 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 1.34.0, < 1.34.4
- from 0, < 1:1.35.0-1
- >= 1.34.0, < 1.34.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |