# CVE-2021-44858: mediawiki: An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1

CVE-2021-44858 is fixed in mediawiki on 1 platform, first by DEBIAN-CVE-2021-44858, released December 20, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-44858
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0137
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 20, 2021

## Description

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. It is possible to use action=edit&undo= followed by action=mcrundo and action=mcrrestore to view private pages on a private wiki that has at least one page set in $wgWhitelistRead.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mediawiki Debian 12.15 (bookworm) | 1:1.35.5-1 | [DEBIAN-CVE-2021-44858](https://patchblox.com/security/data/fix/linux/debian-cve-2021-44858.md) | Dec 20, 2021 |
| Linux | mediawiki Debian 13.5 (trixie) | 1:1.35.5-1 | [DEBIAN-CVE-2021-44858](https://patchblox.com/security/data/fix/linux/debian-cve-2021-44858.md) | Dec 20, 2021 |
| Linux | mediawiki Debian 14 | 1:1.35.5-1 | [DEBIAN-CVE-2021-44858](https://patchblox.com/security/data/fix/linux/debian-cve-2021-44858.md) | Dec 20, 2021 |

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