CVE-2025-46440: kStats Reloaded XSS Vulnerability

CVE-2025-46440 Overview

CVE-2025-46440 is a reflected cross-site scripting (XSS) vulnerability in the kStats Reloaded WordPress plugin developed by Mark. The flaw affects all plugin versions up to and including 0.7.4. It stems from improper neutralization of input during web page generation [CWE-79]. An attacker can craft a malicious URL that, when clicked by a victim, executes arbitrary JavaScript in the victim's browser session. The vulnerability requires user interaction and operates across a network attack vector, with a scope change indicating impact beyond the vulnerable component.

Critical Impact

Successful exploitation allows attackers to execute arbitrary JavaScript in a victim's browser, enabling session hijacking, credential theft, and unauthorized actions on behalf of authenticated WordPress users.

Affected Products

• kStats Reloaded WordPress plugin versions through 0.7.4
• WordPress sites with the kstats-reloaded plugin installed and active
• All deployments using the affected plugin regardless of WordPress core version

Discovery Timeline

• 2025-05-23 - CVE-2025-46440 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-46440

Vulnerability Analysis

The kStats Reloaded plugin fails to properly sanitize or encode user-supplied input before reflecting it back into HTTP responses. This category of flaw, classified under [CWE-79], allows attacker-controlled data to be interpreted as HTML or JavaScript by the browser. Because the payload is reflected rather than stored, exploitation depends on tricking a victim into visiting a crafted URL. The CVSS scope change indicates the injected script can affect resources beyond the vulnerable plugin, including WordPress administrative sessions and cookies governed by the same origin.

Root Cause

The root cause is missing output encoding on request parameters processed by the plugin. User input received via HTTP GET or POST parameters is rendered directly into the generated HTML response without escaping characters such as <, >, ", and '. WordPress provides sanitization helpers such as esc_html(), esc_attr(), and wp_kses(), but the plugin does not consistently apply them to reflected values.

Attack Vector

Exploitation requires an attacker to deliver a crafted link to an authenticated WordPress user, typically through phishing, social media, or a malicious third-party site. When the victim's browser loads the URL, the injected payload executes in the context of the WordPress site. The attacker can steal session cookies, perform actions as the authenticated user, or pivot to administrative functions if a privileged account is targeted. See the Patchstack Advisory: KStats XSS Vulnerability for technical details.

Detection Methods for CVE-2025-46440

Indicators of Compromise

• HTTP request logs containing URL parameters with <script>, javascript:, or encoded equivalents targeting kStats Reloaded plugin endpoints
• Unexpected outbound requests from administrator browsers to attacker-controlled domains following clicks on suspicious links
• WordPress audit log entries showing administrative actions originating from unusual referrers

Detection Strategies

• Inspect web server access logs for requests to /wp-content/plugins/kstats-reloaded/ paths containing reflected query parameters with HTML or script syntax
• Deploy a web application firewall ruleset that flags HTTP parameters containing XSS payload patterns
• Correlate authenticated administrator activity with referrer headers pointing to external or unknown origins

Monitoring Recommendations

• Enable WordPress activity logging and forward events to a centralized SIEM for correlation
• Monitor for new or modified administrator accounts, plugin installations, and theme edits following suspicious traffic
• Track Content Security Policy (CSP) violation reports to identify injection attempts in real time

How to Mitigate CVE-2025-46440

Immediate Actions Required

• Deactivate and remove the kStats Reloaded plugin until a patched release becomes available
• Audit administrator and editor accounts for unauthorized changes, sessions, or password resets
• Force a global logout and require password rotation for privileged WordPress users
• Enable a web application firewall with XSS signature coverage in front of the WordPress site

Patch Information

At the time of publication, no fixed version is listed for the kStats Reloaded plugin beyond 0.7.4. Site administrators should monitor the Patchstack Advisory: KStats XSS Vulnerability and the WordPress plugin repository for updates.

Workarounds

• Remove the plugin entirely if business operations permit, as this eliminates the attack surface
• Restrict access to WordPress administrative paths using IP allowlisting at the web server or firewall layer
• Implement a strict Content Security Policy that disallows inline scripts and untrusted script sources
• Train administrators to avoid clicking unsolicited links referencing their WordPress site domain

# Example Content-Security-Policy header for Apache to limit XSS impact
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"