Attestkeep
Language: English
Sign up

Vulnerabilities / CVE-2023-3550

critical

CVE-2023-3550

mediawiki: stored XSS leads to privilege escalation

Published Modified CWE 79
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Red Hat7.3CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (medium).

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.

Affected packages and fixed versions

SourcePackageFixed in
debian 10mediawiki1:1.31.16-1+deb10u7
debian 11mediawiki1:1.35.13-1~deb11u1
debian 12mediawiki1:1.39.5-1~deb12u1
debian 13mediawiki1:1.39.5-1
debian 14mediawiki1:1.39.5-1
echomediawiki1:1.39.5-1~deb12u1
Red Hatmediawiki, mediawiki-docno fix listed
Show all 8 entries from 7 sources
SourcePackageFixed in
debian 10mediawiki1:1.31.16-1+deb10u7
debian 11mediawiki1:1.35.13-1~deb11u1
debian 12mediawiki1:1.39.5-1~deb12u1
debian 13mediawiki1:1.39.5-1
debian 14mediawiki1:1.39.5-1
echomediawiki1:1.39.5-1~deb12u1
Red Hatmediawikino fix listed
Red Hatmediawiki-docno fix listed

References

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.