CVE-2026-1841 in PixelYourSite Plugin
Summary
by MITRE • 02/14/2026
The PixelYourSite – Your smart PIXEL (TAG) & API Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'pysTrafficSource' parameter and the 'pys_landing_page' parameter in all versions up to, and including, 11.2.0 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.
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Analysis
by VulDB Data Team • 02/20/2026
The PixelYourSite WordPress plugin presents a critical stored cross-site scripting vulnerability that affects versions up to and including 11.2.0. This security flaw resides in the plugin's handling of user-supplied input through two specific parameters: 'pysTrafficSource' and 'pys_landing_page'. The vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's codebase, creating a persistent XSS attack vector that can be exploited by unauthenticated threat actors.
The technical implementation of this vulnerability allows attackers to inject malicious JavaScript code into the plugin's data handling processes. When users access pages containing the injected content, the malicious scripts execute in the context of the victim's browser session. This stored nature of the vulnerability means that the injected code persists in the database and executes every time affected pages are loaded, making it particularly dangerous for widespread impact. The flaw specifically targets the plugin's traffic source tracking and landing page functionality, which are commonly used features in digital marketing and analytics implementations.
From an operational perspective, this vulnerability creates significant risk for WordPress sites using the affected plugin. Unauthenticated attackers can leverage this flaw to execute arbitrary code on victim systems, potentially leading to session hijacking, data theft, or further compromise of the WordPress installation. The attack surface extends to any user who views pages containing the malicious input, including administrators and regular site visitors. This makes the vulnerability particularly concerning in environments where the plugin is widely used for tracking and analytics purposes, as the malicious scripts could be triggered by routine page views.
Security professionals should immediately implement mitigations including updating to the patched version of the PixelYourSite plugin, which addresses the input sanitization and output escaping deficiencies. Organizations should also consider implementing web application firewalls to detect and block suspicious input patterns targeting these specific parameters. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and represents a clear violation of secure coding practices outlined in OWASP Top Ten. Additionally, this vulnerability maps to ATT&CK technique T1566, specifically the use of malicious content delivery through web applications, highlighting the need for comprehensive web application security monitoring and input validation measures.