CVE-2026-58035
Stored XSS through a system message in the codex version of Special:Block
Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Special.Block/SpecialBlock.Vue.
INFO
Published Date :
July 1, 2026, 2:17 p.m.
Last Modified :
July 1, 2026, 2:17 p.m.
Remotely Exploit :
Yes !
Source :
wikimedia-foundation
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | NONE | c4f26cc8-17ff-4c99-b5e2-38fc1793eacc | ||||
| CVSS 4.0 | NONE | c4f26cc8-17ff-4c99-b5e2-38fc1793eacc |
Solution
- Update MediaWiki to the latest secure version.
- Apply vendor-supplied patches for affected versions.
- Validate user input for special characters.
- Sanitize all user-generated content.
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