CVE-2026-66705
Received Received - Intake

Unauthenticated XSS in Facebook for WordPress

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: Patchstack

Description
Unauthenticated Cross Site Scripting (XSS) in Facebook for WordPress <= 5.2.1 versions.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-66705
EUVD
EUVD-2026-53908

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
facebook facebook_for_wordpress to 5.2.1 (inc)
facebook facebook_for_wordpress_plugin to 5.2.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability affecting Facebook for WordPress plugin versions 5.2.1 and below. It allows attackers to inject malicious scripts into web pages viewed by users without requiring authentication.

Detection Guidance

This vulnerability requires user interaction to exploit, such as clicking a malicious link. Detection involves checking if the WordPress Facebook for WordPress plugin version is 5.2.1 or below. Use commands like 'wp plugin list' in WordPress CLI or inspect the plugin version in the WordPress admin panel.

Impact Analysis

An attacker could exploit this to steal user sessions, redirect users to malicious sites, or deface web pages. Users with admin access could have their accounts compromised, leading to potential site takeover or data theft.

Compliance Impact

This XSS vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements. For HIPAA, it may compromise protected health information integrity, potentially leading to compliance violations.

Mitigation Strategies

Update the Facebook for WordPress plugin to the latest version, which is 5.2.1 or higher. If an update is not available, consider disabling or removing the plugin until a patch is released.

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