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CVE-2026-66705— WordPress Facebook for WordPress plugin <= 5.2.1 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected
Facebook Facebook for WordPress
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Meta pixel for WordPress是WordPress基金会开源的一款内容管理系统像素追踪插件。 WordPress Meta pixel for WordPress 5.2.1及之前版本存在跨站脚本漏洞，该漏洞源于容易受到未经验证的跨站脚本攻击。

CVSS 7.1 · High EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
Facebook Facebook for WordPress n/a≤ 5.2.1 affected
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I. Basic Information for CVE-2026-66705

Vulnerability Information
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Vulnerability Title
WordPress Facebook for WordPress plugin <= 5.2.1 - Cross Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated Cross Site Scripting (XSS) in Facebook for WordPress <= 5.2.1 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Meta pixel for WordPress 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Meta pixel for WordPress是WordPress基金会开源的一款内容管理系统像素追踪插件。 WordPress Meta pixel for WordPress 5.2.1及之前版本存在跨站脚本漏洞，该漏洞源于容易受到未经验证的跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Facebook Facebook for WordPress n/a ~ 5.2.1 -

II. Public POCs for CVE-2026-66705

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III. Intelligence Information for CVE-2026-66705

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IV. Related Vulnerabilities

Same product: Facebook for WordPress
Same vendor: Facebook
Same weakness: CWE-79

V. Comments for CVE-2026-66705

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