XSS in MediaWiki
CVE-2023-3550
Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.014 · change: +0.002
Affected products
- MediaWiki — versions 1.40.0
- Debian Linux — versions 10.0, 11.0
Weakness classification (CWE)
References
- fluidattacks.com/advisories/blondie/ (Exploit, Third Party Advisory)
- www.mediawiki.org/wiki/MediaWiki/ (Product)
- www.debian.org/security/2023/dsa-5520 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/11/msg00027.html (Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
Frequently asked questions
- What is CVE-2023-3550?
- CVE-2023-3550 is a high-severity vulnerability in MediaWiki, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2023-09-25.
- How severe is CVE-2023-3550?
- High severity. CVSS v3 base score is 7.3 out of 10.