Vulnerability · Published Feb 2, 2026 · Assigned by wikimedia-foundation
CVE-2025-6589With MultiBlocks enabled and a user who is suppressed via a MultiBlock, a user without 'hideuser' can see the hidden username in the BlockList
Low 2.1
In plain English
A low-severity path traversal in MediaWiki from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)2.1Low
Exploit odds (30 days)0.5%top 58.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/specials/pagers/BlockListPager.Php. This issue affects MediaWiki: >= 1.42.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | mediawiki | 1:1.43.3+dfsg-1 | DEBIAN-CVE-2025-6589 |
| Debian:14 | mediawiki | 1:1.43.3+dfsg-1 | DEBIAN-CVE-2025-6589 |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-6589 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2025-6589 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-6589 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wikimedia Foundation | MediaWiki | >= 1.42.0 |
Weakness: CWE-22 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y