CVE-2026-25361 in WpEvently Plugin
Summary
by MITRE • 03/25/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in magepeopleteam WpEvently mage-eventpress allows Reflected XSS.This issue affects WpEvently: from n/a through <= 5.1.4.
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Analysis
by VulDB Data Team • 03/31/2026
The CVE-2026-25361 vulnerability represents a critical cross-site scripting flaw within the magepeopleteam WpEvently mage-eventpress plugin, specifically impacting versions through 5.1.4. This reflected cross-site scripting vulnerability arises from inadequate input sanitization during web page generation processes, creating a significant security risk for WordPress installations utilizing this plugin. The vulnerability stems from the plugin's failure to properly neutralize user-supplied input before incorporating it into dynamically generated web content, allowing malicious actors to inject malicious scripts into web pages viewed by other users.
The technical implementation of this vulnerability occurs when the plugin processes user input through HTTP request parameters without adequate validation or sanitization measures. When legitimate users access pages that contain unfiltered input data, the malicious script code becomes embedded within the generated HTML content and executes within the browser context of other users who view these pages. This reflected nature means the malicious script is not stored on the server but is instead reflected back to the user through the web application's response, making it particularly challenging to detect and prevent through traditional server-side storage-based approaches.
From an operational impact perspective, this vulnerability exposes WordPress sites using the affected plugin to several serious security risks including session hijacking, credential theft, and potential complete system compromise. Attackers can exploit this vulnerability to steal administrator credentials, inject malicious advertisements, redirect users to phishing sites, or even execute arbitrary code within the victim's browser context. The reflected nature of the attack means that exploitation requires social engineering to convince users to click on malicious links containing crafted payloads, but once executed, the impact can be severe and persistent across multiple user sessions. This vulnerability directly aligns with CWE-79 which defines cross-site scripting as the failure to properly neutralize input data, and maps to ATT&CK technique T1566.001 for initial access through spearphishing attachments or links.
The mitigation strategy for this vulnerability requires immediate action from affected organizations to upgrade to the patched version of the WpEvently mage-eventpress plugin, as no specific patch information is available for versions beyond 5.1.4. System administrators should implement comprehensive input validation and output encoding measures across all user-supplied data, ensuring that any data entering the application is properly sanitized before being incorporated into web page generation. Additionally, implementing content security policies and using web application firewalls can provide additional layers of protection against exploitation attempts. Organizations should also conduct thorough security audits of their WordPress installations to identify any other potentially vulnerable plugins or themes that may be susceptible to similar input validation flaws. The remediation process should include monitoring for any suspicious activity or unauthorized access attempts that may have occurred during the vulnerability's active period, as well as implementing regular security updates and patch management procedures to prevent similar issues in the future.