CVE-2023-3550: Stored XSS leads to privilege escalation in MediaWiki v1.40.0
First published: Mon Sep 25 2023(Updated: )
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.
Credit: help@fluidattacks.com help@fluidattacks.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/mediawiki | <=1:1.31.16-1+deb10u2<=1:1.35.11-1~deb11u1 | 1:1.31.16-1+deb10u7 1:1.35.13-1~deb11u1 1:1.39.5-1~deb12u1 1:1.39.5-1 |
| MediaWiki MediaWiki | =1.40.0 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 |
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Reference Links
- https://phabricator.wikimedia.org/T341565
- https://security-tracker.debian.org/tracker/CVE-2023-3550
- https://fluidattacks.com/advisories/blondie/
- https://www.debian.org/security/2023/dsa-5520
- https://www.mediawiki.org/wiki/MediaWiki/
- https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2023-3550.
What is the severity of CVE-2023-3550?
CVE-2023-3550 has a severity level of critical (9).
How does CVE-2023-3550 impact Mediawiki v1.40.0?
CVE-2023-3550 allows a remote attacker with a low-privileged user account to become an administrator by sending a malicious link to the instance administrator.
How can I fix CVE-2023-3550 in Mediawiki v1.40.0?
To fix CVE-2023-3550 in Mediawiki v1.40.0, you should apply the latest security patch provided by Mediawiki.
Where can I find more information about CVE-2023-3550?
You can find more information about CVE-2023-3550 in the following references: - Fluid Attacks Advisory: [https://fluidattacks.com/advisories/blondie/](https://fluidattacks.com/advisories/blondie/) - Mediawiki Documentation: [https://www.mediawiki.org/wiki/MediaWiki/](https://www.mediawiki.org/wiki/MediaWiki/)
- collector/security-tracker-debian
- agent/author
- agent/type
- agent/event
- agent/first-publish-date
- agent/title
- agent/severity
- agent/weakness
- agent/description
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/softwarecombine
- agent/references
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- package-manager/debian
- vendor/mediawiki
- canonical/mediawiki mediawiki
- version/mediawiki mediawiki/1.40.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- version/debian debian linux/11.0