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CVE-2023-3550
Stored XSS leads to privilege escalation in MediaWiki v1.40.0
High7.3EPSS 1.4%
- Published
- Updated
- Reserved
- Assigned by
- Fluid Attacks
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| Fluid AttacksCNA (assigner) | 3.1 | High7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
| NVDNVD · Modified | 3.1 | High7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.4% · top 28% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.
Weakness
Affected products
References (5)
- https://fluidattacks.com/advisories/blondie/ (opens in a new tab)x_transferred
- https://www.mediawiki.org/wiki/MediaWiki/ (opens in a new tab)x_transferred
- https://www.debian.org/security/2023/dsa-5520 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-3550)Record last updated .