XSS in MediaWiki
CVE-2021-42047
An issue was discovered in the Growth extension in MediaWiki through 1.36.2. On any Wiki with the Mentor Dashboard feature enabled, users can login with a mentor account and trigger an XSS payload (such as alert) via Growthexperiments-mentor-dashboard-mentee-overview-no-js-fallback.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (49.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.5% 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/T289063 (Patch, Vendor Advisory)
- gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/720088 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-42047?
- CVE-2021-42047 is a medium-severity vulnerability in MediaWiki, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-09-29.
- How severe is CVE-2021-42047?
- Medium severity. CVSS v3 base score is 5.4 out of 10.