XSS in MediaWiki
CVE-2021-42044
An issue was discovered in the Mentor dashboard in the GrowthExperiments extension in MediaWiki through 1.36.2. The Growthexperiments-mentor-dashboard-mentee-overview-add-filter-total-edits-headline, growthexperiments-mentor-dashboard-mentee-overview-add-filter-starred-headline, growthexperiments-mentor-dashboard-mentee-overview-info-text, growthexperiments-mentor-dashboard-mentee-overview-info-legend-headline, and growthexperiments-mentor-dashboard-mentee-overview-active-ago MediaWiki messages were not being properly sanitized and allowed for the injection and execution of HTML and JavaScript.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (48.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T289408 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- gerrit.wikimedia.org/r/q/I858d55fb2eca9b50ac6ef5a6f2a7b2784f0fa0d6 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-42044?
- CVE-2021-42044 is a medium-severity vulnerability in MediaWiki, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-10-06.
- How severe is CVE-2021-42044?
- Medium severity. CVSS v3 base score is 4.8 out of 10.