CVE-2026-85679 json
Extendify <= 3.1.6 - Unauthenticated Stored Cross-Site Scripting via 'styles.blocks' Block Type Key
published 2026-10-01 39 d ago modified 2026-10-03 36 d ago also EUVD-2026-90500
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
The Extendify plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'styles.blocks' Block Type Key in all versions up to, and including, 3.1.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is possible because registerIncoming() is hooked on rest_request_before_callbacks and runs before WordPress evaluates the route's permission_callback, meaning any unauthenticated POST, PUT, or PATCH request to a /wp/v2/global-styles route can trigger the vulnerable code path.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 36 d ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- extendify Extendify
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/38024680-2d99-4af0-b805-6fd718a1d338?source=cve
- plugins.trac.wordpress.org /browser/extendify/tags/3.1.6/app/Shared/Services/BlockStyleVariations.php#L62
- plugins.trac.wordpress.org /browser/extendify/tags/3.1.6/app/Shared/Services/BlockStyleVariations.php#L75
- plugins.trac.wordpress.org /browser/extendify/tags/3.1.6/app/Shared/Services/BlockStyleVariations.php#L29
- plugins.trac.wordpress.org /browser/extendify/tags/3.1.6/app/Shared/Services/BlockStyleVariations.php#L37
- plugins.trac.wordpress.org /browser/extendify/tags/3.1.6/bootstrap.php#L112
- plugins.trac.wordpress.org /changeset?reponame=&new=3688833%40extendify%2Ftags%2F3.2.0&old=3669317%40extendify%2Ftags%2F3.1.6
- plugins.trac.wordpress.org /changeset/3688833/extendify/trunk/app/Shared/Services/BlockStyleVariations.php
Sources
- CVE List CVE-2026-85679
- NVD CVE-2026-85679
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.