Description
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.
Published: 2026-10-01
Score: 7.2 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 03 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Extendify
Extendify extendify
Wordpress-extensions
Wordpress-extensions extendify
Vendors & Products Extendify
Extendify extendify
Wordpress-extensions
Wordpress-extensions extendify

Thu, 01 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Extendify <= 3.1.6 - Unauthenticated Stored Cross-Site Scripting via 'styles.blocks' Block Type Key
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}


Subscriptions

Extendify Extendify
Wordpress-extensions Extendify
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-10-03T15:42:52.738Z

Reserved: 2026-09-04T13:38:58.902Z

Link: CVE-2026-85679

cve-icon Vulnrichment

Updated: 2026-10-03T15:41:16.449Z

cve-icon NVD

Status : Deferred

Published: 2026-10-01T06:17:11.577

Modified: 2026-10-03T16:16:39.530

Link: CVE-2026-85679

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T19:35:06Z

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')