Description
An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Blocked users are unable to use Special:ResetTokens. This has security relevance because a blocked user might have accidentally shared a token, or might know that a token has been compromised, and yet is not able to block any potential future use of the token by an unauthorized party.
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 | 1:1.35.2-1 | — |
| Debian 13 | mediawiki | 1:1.35.2-1 | — |
| Debian 12 | mediawiki | 1:1.35.2-1 | — |
| Debian 10 | mediawiki | 1:1.31.14-1~deb10u1 | DSA-4889-1 |
| Debian 9 | mediawiki | 1:1.27.7-1~deb9u8 | DLA-2648-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mediawiki | No fix yet | — |
| Ubuntu 26.04 LTS | mediawiki | No fix yet | — |
| Ubuntu 25.10 | mediawiki | No fix yet | — |
| Ubuntu 18.04 LTS | mediawiki | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | mediawiki | No fix yet | — |
| Ubuntu Pro 22.04 LTS | mediawiki | No fix yet | — |
| Ubuntu Pro 20.04 LTS | mediawiki | No fix yet | — |
Advisories 2
- DSA-4889-1 mediawiki - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2648-1 mediawiki - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://phabricator.wikimedia.org/T277009
- DSA-4889 vendor-advisory
- FEDORA-2021-f4223b6684 vendor-advisory
- FEDORA-2021-d298103d3a vendor-advisory
- [debian-lts-announce] 20210505 [SECURITY] [DLA 2648-1] mediawiki security update mailing-list
- [debian-lts-announce] 20210506 [SECURITY] [DLA 2648-2] mediawiki regression update mailing-list
- GLSA-202107-40 vendor-advisory