CVE-2025-24631: BP Email Assign Templates XSS Flaw

CVE-2025-24631 Overview

CVE-2025-24631 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the BP Email Assign Templates WordPress plugin (bp-email-assign-templates). This vulnerability stems from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

Critical Impact

This Reflected XSS vulnerability enables attackers to execute arbitrary JavaScript code in the browsers of users who click on specially crafted malicious links, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim.

Affected Products

• BP Email Assign Templates WordPress Plugin version 1.5 and earlier
• WordPress installations running vulnerable versions of bp-email-assign-templates
• BuddyPress environments utilizing the BP Email Assign Templates extension

Discovery Timeline

• 2025-02-03 - CVE-2025-24631 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-24631

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The BP Email Assign Templates plugin fails to properly sanitize user-supplied input before reflecting it back in the web page response. This allows an attacker to craft malicious URLs containing JavaScript payloads that execute when a victim clicks the link.

The attack requires user interaction—specifically, a victim must be tricked into clicking a malicious link. However, once clicked, the injected script runs within the security context of the vulnerable WordPress site, granting the attacker access to session cookies, DOM manipulation capabilities, and the ability to perform actions as the authenticated user.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding within the BP Email Assign Templates plugin. User-controllable input is directly embedded into HTML responses without proper sanitization using WordPress's built-in escaping functions such as esc_html(), esc_attr(), or wp_kses(). This allows specially crafted input containing JavaScript code to be interpreted and executed by the browser rather than being displayed as harmless text.

Attack Vector

The attack vector for CVE-2025-24631 is network-based, requiring low attack complexity but necessitating user interaction. An attacker constructs a malicious URL containing an XSS payload targeting a vulnerable parameter in the BP Email Assign Templates plugin. The attacker then distributes this link through phishing emails, social media, or other channels. When a victim clicks the link while authenticated to the WordPress site, the malicious script executes with the victim's privileges.

The vulnerability allows impacts to confidentiality, integrity, and availability. Attackers can steal session tokens, modify page content, redirect users to malicious sites, or perform actions on behalf of the victim such as changing account settings or creating administrator accounts if the victim has sufficient privileges.

Detection Methods for CVE-2025-24631

Indicators of Compromise

• Unusual URL parameters containing JavaScript code, HTML tags, or encoded script sequences in web server access logs
• Access log entries showing requests to BP Email Assign Templates endpoints with suspicious query strings containing characters like <script>, javascript:, or encoded variants
• User reports of unexpected browser behavior or pop-ups when accessing the WordPress site

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payload patterns in request parameters
• Monitor web server access logs for requests containing potential XSS indicators such as <script>, onerror=, onload=, and similar event handlers
• Deploy browser-based Content Security Policy (CSP) headers to restrict inline script execution and report violations
• Utilize WordPress security plugins that provide real-time XSS attack detection and logging

Monitoring Recommendations

• Enable detailed logging for the BP Email Assign Templates plugin and related WordPress components
• Configure alerting for anomalous patterns in URL parameters, particularly those containing encoded characters or script-related keywords
• Review authentication logs for signs of session hijacking following potential XSS exploitation attempts

How to Mitigate CVE-2025-24631

Immediate Actions Required

• Deactivate the BP Email Assign Templates plugin immediately if version 1.5 or earlier is installed
• Check for available plugin updates and apply the latest patched version when released
• Review WordPress admin accounts for any unauthorized changes that may indicate prior exploitation
• Implement a Web Application Firewall with XSS protection rules as an interim measure

Patch Information

Organizations should monitor the Patchstack Vulnerability Analysis for updates on available patches. Until a patch is available, the plugin should be deactivated on production systems. Site administrators should subscribe to security advisories from the plugin developer and apply updates as soon as they become available.

Workarounds

• Deactivate and remove the BP Email Assign Templates plugin until a security update is available
• Implement strict Content Security Policy (CSP) headers to prevent inline script execution, which can mitigate the impact of XSS attacks
• Deploy a Web Application Firewall (WAF) with rules specifically designed to detect and block reflected XSS payloads
• Educate users about the risks of clicking unknown links and implement browser security extensions that warn about suspicious URLs

# Add Content Security Policy headers to Apache configuration
# Add to .htaccess or Apache VirtualHost configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"

# For Nginx, add to server block
# add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';";