CVE-2025-24718: WP Sessions Time Monitoring XSS Vulnerability

CVE-2025-24718 Overview

CVE-2025-24718 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the WP Sessions Time Monitoring Full Automatic WordPress plugin (also known as activitytime) developed by activity-log.com. This vulnerability exists due to 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 in authenticated user sessions, potentially leading to session hijacking, credential theft, and unauthorized actions within the WordPress admin panel.

Affected Products

• WP Sessions Time Monitoring Full Automatic plugin versions through 1.1.1
• WordPress sites using the activitytime plugin

Discovery Timeline

• 2025-01-31 - CVE-2025-24718 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-24718

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). The WP Sessions Time Monitoring Full Automatic plugin fails to properly sanitize user-supplied input before reflecting it back in HTTP responses. When an attacker crafts a malicious URL containing JavaScript payload and tricks a victim into clicking it, the script executes within the victim's authenticated browser session.

The network-based attack vector requires user interaction, as victims must click on a specially crafted link. However, the scope is changed, meaning the vulnerability can impact resources beyond the vulnerable component itself, potentially affecting the entire WordPress installation's security context.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and output encoding within the plugin's web page generation logic. User-controlled parameters are reflected in the page output without proper sanitization, allowing injection of executable script content. The plugin fails to implement adequate escaping mechanisms for special characters that could be interpreted as HTML or JavaScript by the browser.

Attack Vector

This reflected XSS vulnerability requires an attacker to craft a malicious URL containing the XSS payload and distribute it to potential victims through social engineering techniques such as phishing emails, malicious websites, or compromised forums. When an authenticated WordPress administrator or user clicks the crafted link, the malicious JavaScript executes in their browser with the permissions of that session.

Successful exploitation could allow attackers to steal session cookies, capture credentials, modify page content, redirect users to malicious sites, or perform actions on behalf of the victim user. Due to the scope change characteristic, the attack can potentially impact other WordPress components and plugins beyond the vulnerable activitytime plugin itself.

Detection Methods for CVE-2025-24718

Indicators of Compromise

• Suspicious URL parameters containing JavaScript code or HTML entities in requests to the activitytime plugin endpoints
• Unusual cross-origin requests originating from WordPress admin sessions
• Unexpected JavaScript execution patterns in browser console logs
• Session cookie exfiltration attempts in network traffic logs

Detection Strategies

• Monitor web server access logs for URLs containing common XSS payloads such as <script>, javascript:, onerror=, or encoded variants
• Implement Content Security Policy (CSP) headers to detect and block inline script execution attempts
• Deploy web application firewall (WAF) rules to identify and block reflected XSS attack patterns
• Review WordPress admin activity logs for suspicious actions that may indicate session compromise

Monitoring Recommendations

• Enable verbose logging on WordPress and monitor for plugin-related error messages
• Configure browser security headers including X-XSS-Protection and Content-Security-Policy
• Implement real-time alerting for requests containing potentially malicious payloads to the activitytime plugin
• Monitor for unusual session behavior or administrative actions following external link clicks

How to Mitigate CVE-2025-24718

Immediate Actions Required

• Update the WP Sessions Time Monitoring Full Automatic plugin to a patched version when available from the vendor
• Consider temporarily deactivating and removing the activitytime plugin until a security patch is released
• Implement web application firewall rules to filter common XSS attack patterns
• Enable Content Security Policy headers to mitigate the impact of successful XSS attacks

Patch Information

No official patch information is currently available in the CVE data. Organizations should monitor the Patchstack XSS Vulnerability Report for updates on remediation guidance and patch availability from the plugin developer.

Workarounds

• Disable the WP Sessions Time Monitoring Full Automatic plugin until a patched version is available
• Implement strict Content Security Policy headers to prevent inline script execution
• Deploy WAF rules to filter requests containing XSS payloads targeting the plugin
• Educate users about the risks of clicking suspicious links, particularly while authenticated to WordPress admin

# WordPress Content Security Policy configuration example via .htaccess
<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
</IfModule>