CVE-2023-3550

Stored XSS leads to privilege escalation in MediaWiki v1.40.0

Published Sep 25, 2023 CVSS 3.1 · 7.3 High EPSS 1.4% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3671-1 mediawiki security update
Debian DSA Debian DSA DSA-5520-1 mediawiki security update
EUVD EUVD EUVD-2023-44206 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.
History
Type Values Removed Values Added
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. 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.
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Fluid Attacks
Published
Updated
Feb 13, 2025, 4:55 PM
Reserved
Jul 8, 2023, 1:02 AM
Status
Modified
Published
Sep 25, 2023, 4:15 PM
Modified
Jun 17, 2026, 6:14 AM
Severity
Moderate
Public date
Sep 25, 2023, 12:00 AM