Stored XSS leads to privilege escalation in MediaWiki v1.40.0
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.3epss 1.2%
exploitation probability
1.2%top 36% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Affected products
MediaWiki · MediaWikiReferences
https://fluidattacks.com/advisories/blondie/https://lists.debian.org/debian-lts-announce/2023/11/msg00027.htmlhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/https://www.debian.org/security/2023/dsa-5520https://www.mediawiki.org/wiki/MediaWiki/