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CVE-2026-109987— PixelYourSite (Free & Pro) - Unauthenticated Stored XSS via Cookie

Quick assessment

Affected
Unknown PixelYourSite
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.

在 11.4.3 版本之前的 PixelYourSite WordPress 插件，以及 12.6.8 版本之前的 PixelYourSite Pro WordPress 插件，在将 Cookie 值输出到页面内容之前，未对其进行清理（sanitise）和转义（escape）处理。若网站启用了整页缓存（full-page cache），未认证的攻击者可利用此漏洞将跨站脚本（XSS）攻击载荷注入并存储于缓存页面中，随后该页面会被分发给其他访问者，从而触发攻击。

AI Predicted 6.1 Difficulty: Easy
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I. Basic Information for CVE-2026-109987

Vulnerability Information
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Vulnerability Title
PixelYourSite (Free & Pro) - Unauthenticated Stored XSS via Cookie
Source: CVE Program / CVE List V5
Vulnerability Description
The PixelYourSite WordPress plugin before 11.4.3, PixelYourSite Pro WordPress plugin before 12.6.8 do not sanitise and escape a cookie value before printing it into the page output, which, on a site running a full-page cache, allows unauthenticated attackers to store a Cross-Site Scripting payload in the cached page that is then served to other visitors.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown PixelYourSite 0 ~ 11.4.3 -
Unknown PixelYourSite Pro 0 ~ 12.6.8 -

II. Public POCs for CVE-2026-109987

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-109987

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Other References for CVE-2026-109987 (1)

Same Patch Batch · Unknown · 2026-10-22 · 13 CVEs total

CVE-2026-97328 WebP Express < 0.25.16 - Unauthenticated Stored XSS via Alter HTML Parser
CVE-2026-88849 MasterStudy LMS 3.7.13 - 3.7.54 - Instructor+ Arbitrary User Display Name Update via Stude
CVE-2026-111971 Photo Engine < 6.5.8 - Author+ Stored XSS via Collection Name
CVE-2026-111972 Photo Engine < 6.5.8 - Author+ Arbitrary Attachment Deletion via IDOR
CVE-2026-111958 Royal MCP < 1.5.7 - Authentication Bypass via Preview Link Token
CVE-2026-78392 Link Library < 7.9.6 - Contributor+ Stored XSS via 'link_target' Parameter
CVE-2026-110011 MB Custom Post Types & Custom Taxonomies 2.4.0 - 2.12.2 - Contributor+ Post Type Definitio
CVE-2026-110010 MB Custom Post Types & Custom Taxonomies 2.0.2 - 2.12.2 - Unauthenticated Settings Reset v
CVE-2026-103234 WP Ultimate Review < 2.4.5 - Unauthenticated Arbitrary Shortcode Execution via Reviewer Em
CVE-2026-100142 FluentCart < 2.2.0 - Unauthenticated Customer Address Disclosure via IDOR
CVE-2026-109931 Infility Global < 2.16.25 - Unauthenticated Google Translate API Key Update
CVE-2026-109927 CM HIPAA Forms < 3.3.2 - hipaa_forms+ Privilege Escalation via cm_hipaa_update_user_role

IV. Related Vulnerabilities

Same product: PixelYourSite
Same vendor: Unknown

V. Comments for CVE-2026-109987

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