XSS in MediaWiki
CVE-2022-34911
An issue was discovered in MediaWiki before 1.35.7, 1.36.x and 1.37.x before 1.37.3, and 1.38.x before 1.38.1. XSS can occur in configurations that allow a JavaScript payload in a username. After account creation, when it sets the page title to "Welcome" followed by the username, the username is not escaped: SpecialCreateAccount::successfulAction() calls ::showSuccessPage() with a message as second parameter, and OutputPage::setPageTitle() uses text().
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: 0.011 (63.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.011 · change: +0.000
Affected products
- MediaWiki — versions 1.38.0
- Fedoraproject Fedora — versions 36, 37
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T308471 (Issue Tracking, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2022/09/msg00027.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5246 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202305-24 (vendor-advisory)
Frequently asked questions
- What is CVE-2022-34911?
- CVE-2022-34911 is a medium-severity vulnerability in MediaWiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-07-02.
- How severe is CVE-2022-34911?
- Medium severity. CVSS v3 base score is 6.1 out of 10.