CVE-2026-8141 in Ajax Load More Plugin
Summary
by MITRE • 06/30/2026
The Ajax Load More - Filters plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'taxonomy_include_children' parameter in all versions up to, and including, 3.4.1 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 • 06/30/2026
The Ajax Load More - Filters plugin for WordPress represents a widely used component for enhancing dynamic content loading on wordpress websites. This particular vulnerability affects all versions up to and including 3.4.1, creating a significant security risk for wordpress installations that utilize this plugin. The flaw resides in the handling of the 'taxonomy_include_children' parameter which demonstrates a critical failure in input validation and output sanitization processes. This stored cross-site scripting vulnerability allows unauthenticated attackers to inject malicious web scripts into the application's pages through crafted requests.
The technical implementation of this vulnerability stems from insufficient sanitization of user-supplied input within the plugin's parameter handling mechanism. When the 'taxonomy_include_children' parameter is processed, the plugin fails to properly validate or escape the input before it is stored in the database or rendered in subsequent page outputs. This creates a persistent XSS vector where malicious scripts can be stored and executed whenever legitimate users access pages containing the injected content. The vulnerability operates at the application layer and affects the web server's response handling capabilities, making it particularly dangerous as it can compromise user sessions and data integrity.
The operational impact of this vulnerability extends beyond simple script execution, representing a serious threat to wordpress site security and user privacy. Attackers can leverage this weakness to execute malicious code in the context of affected websites, potentially leading to session hijacking, credential theft, or further exploitation of the compromised systems. The stored nature of the vulnerability means that once injected, the malicious scripts will persist and execute automatically whenever users access infected pages, creating a continuous threat vector. This makes the vulnerability particularly concerning for wordpress sites that rely on user-generated content or have multiple administrators with varying privilege levels.
Mitigation strategies should focus on immediate remediation through plugin version updates to versions that address the sanitization flaws. System administrators should implement comprehensive input validation measures and ensure proper output escaping for all parameters processed by the plugin. Additionally, implementing web application firewalls and content security policies can provide additional layers of protection against such attacks. The vulnerability aligns with CWE-79 which addresses cross-site scripting flaws in web applications, and follows patterns identified in ATT&CK technique T1566 related to initial access through malicious content delivery. Organizations should conduct thorough security assessments of all installed wordpress plugins and maintain updated vulnerability management processes to prevent similar issues from occurring in the future.