High severity · published Sep 25, 2023
CVE-2023-3550
Stored XSS leads to privilege escalation in MediaWiki v1.40.0
7.3
CVSS
1.4%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
MediaWiki · MediaWiki
1.40.0 · source: vendor, NVD
DL
Debian Linux · Debian
10.0; 11.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-3550
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-3550
Exploit
https://fluidattacks.com/advisories/blondie/
Mailing List
https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
Third Party Advisory
https://www.debian.org/security/2023/dsa-5520
Product
https://www.mediawiki.org/wiki/MediaWiki/
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