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CVE-2023-3550 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CNA: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://fluidattacks.com/advisories/blondie/	CVE	ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html	CVE	Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/	CVE
https://www.debian.org/security/2023/dsa-5520	CVE	Third Party Advisory
https://www.mediawiki.org/wiki/MediaWiki/	CVE	Product
https://fluidattacks.com/advisories/blondie/	[email protected]	ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html	[email protected]	Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/	[email protected]
https://www.debian.org/security/2023/dsa-5520	[email protected]	Third Party Advisory
https://www.mediawiki.org/wiki/MediaWiki/	[email protected]	Product

see all 10 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
mediawiki mediawiki	1.40.0 -
CPE cpe:2.3:a:mediawiki:mediawiki:1.40.0:-:::::: Remediation No remediation found in references.
debian debian linux	10.0 11.0
CPE cpe:2.3:o:debian:debian_linux:10.0:::::::* cpe:2.3:o:debian:debian_linux:11.0:::::::* Remediation No remediation found in references.

Change History

10 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Feb 13, 2025	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
Jun 10, 2024	CVE Modified	[email protected]
May 14, 2024	CVE Modified	[email protected]
Feb 1, 2024	Modified Analysis	[email protected]
Nov 28, 2023	CVE Modified	[email protected]
Oct 11, 2023	CVE Modified	[email protected]
Sep 26, 2023	Initial Analysis	[email protected]