Description
In MediaWiki before 1.31.10 and 1.32.x through 1.34.x before 1.34.4, Special:UserRights exposes the existence of hidden users.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mediawiki | 1:1.35.0-1 | — |
| Debian 13 | mediawiki | 1:1.35.0-1 | — |
| Debian 12 | mediawiki | 1:1.35.0-1 | — |
| Debian 10 | mediawiki | 1:1.31.10-1~deb10u1 | DSA-4767-1 |
| Debian 9 | mediawiki | 1:1.27.7-1~deb9u4 | DLA-2379-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | mediawiki | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | mediawiki | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | mediawiki/core | >= 1.31.0, < 1.31.9 | 1.31.9 | GHSA-c4rj-wrmq-52rj |
| Packagist | mediawiki/core | >= 1.32.0, < 1.34.3 | 1.34.3 | GHSA-c4rj-wrmq-52rj |
Advisories 2
- DSA-4767-1 mediawiki - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2379-1 mediawiki - security update Debian Security (DSA / DLA) · Mar 9, 2026