# CVE-2023-3550: mediawiki: Mediawiki v1.40.0 does not validate namespaces used in XML files

CVE-2023-3550 is fixed in mediawiki on 1 platform, first by DEBIAN-CVE-2023-3550, released September 25, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-3550
- Priority: High
- CVSS: 7.3 (high)
- EPSS: 0.0138
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 25, 2023

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mediawiki Debian 11.6 (bullseye) | 1:1.35.13-1~deb11u1 | [DSA-5520-1](https://patchblox.com/security/data/fix/linux/dsa-5520-1.md) | Oct 10, 2023 |
| Linux | mediawiki Debian 12.15 (bookworm) | 1:1.39.5-1~deb12u1 | [DSA-5520-1](https://patchblox.com/security/data/fix/linux/dsa-5520-1.md) | Oct 10, 2023 |
| Linux | mediawiki Debian 13.5 (trixie) | 1:1.39.5-1 | [DEBIAN-CVE-2023-3550](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3550.md) | Sep 25, 2023 |
| Linux | mediawiki Debian 14 | 1:1.39.5-1 | [DEBIAN-CVE-2023-3550](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3550.md) | Sep 25, 2023 |

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