XSS in MediaWiki
CVE-2020-35622
An issue was discovered in the GlobalUsage extension for MediaWiki through 1.35.1. SpecialGlobalUsage.php calls WikiMap::makeForeignLink unsafely. The $page variable within the formatItem function was not being properly escaped, allowing for XSS under certain conditions.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T268341 (Third Party Advisory)
- gerrit.wikimedia.org/r/c/mediawiki/extensions/GlobalUsage/+/646744 (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2020-35622?
- CVE-2020-35622 is a medium-severity vulnerability in MediaWiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-12-21.
- How severe is CVE-2020-35622?
- Medium severity. CVSS v3 base score is 6.1 out of 10.