CVE-2023-3550
HIGH severity · CVSS 7.3 · Cross-site scripting (XSS)
7.3CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://lists.debian.org/debian-lts-announce/2023/11/msg00027.htmlAdvisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
- https://www.debian.org/security/2023/dsa-5520Advisory
- https://www.mediawiki.org/wiki/MediaWiki/
- https://fluidattacks.com/advisories/blondie/Advisory