CVE-2025-22513: Simple Locator XSS Vulnerability

CVE-2025-22513 Overview

CVE-2025-22513 is a reflected Cross-Site Scripting (XSS) vulnerability affecting the Kyle Phillips Simple Locator WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Attackers can craft malicious URLs that, when visited by an authenticated or unauthenticated user, execute arbitrary JavaScript in the victim's browser context. The vulnerability affects all versions of Simple Locator up to and including 2.0.4. Successful exploitation can lead to session theft, credential harvesting, defacement, or redirection to attacker-controlled infrastructure. Because the attack vector is network-based and requires only user interaction, exploitation is feasible through phishing or social engineering campaigns targeting site administrators.

Critical Impact
Reflected XSS allows attackers to execute arbitrary JavaScript in a victim's browser, enabling session hijacking, credential theft, and privilege escalation on affected WordPress sites.

Affected Products

Kyle Phillips Simple Locator WordPress plugin versions through 2.0.4
WordPress installations with the simple-locator plugin enabled
Any site administrator or visitor interacting with a crafted URL on a vulnerable instance

Discovery Timeline

2025-01-27 - CVE-2025-22513 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-22513

Vulnerability Analysis

The vulnerability is classified under [CWE-79] - Improper Neutralization of Input During Web Page Generation. Simple Locator fails to sanitize or encode user-supplied parameters before reflecting them into HTML output. An attacker constructs a URL containing JavaScript payloads within vulnerable query parameters. When a victim clicks the link, the plugin echoes the unsanitized input directly into the rendered page, causing the browser to execute the injected script.

Reflected XSS in a WordPress plugin context is particularly impactful because administrators frequently interact with plugin-generated pages. A successful payload running in an administrator's session can perform actions such as creating new admin users, exfiltrating nonces, or injecting persistent backdoors through the WordPress REST API.

Root Cause

The root cause is the absence of output encoding and input validation on request parameters processed by the Simple Locator plugin. Functions handling user input do not apply WordPress sanitization helpers such as esc_html(), esc_attr(), or sanitize_text_field() before rendering values into the page DOM.

Attack Vector

The attack requires no authentication but does require user interaction. The scope is changed, meaning the vulnerability impacts resources beyond the vulnerable component. An attacker delivers a crafted link via email, chat, or a malicious referrer. Once the victim loads the URL on a site running Simple Locator <= 2.0.4, the injected script executes under the site's origin.

Technical details on the payload mechanics are available in the PatchStack XSS Vulnerability Report.

Detection Methods for CVE-2025-22513

Indicators of Compromise

HTTP requests to Simple Locator endpoints containing <script>, javascript:, onerror=, or URL-encoded equivalents in query parameters
Unexpected outbound requests from administrator browsers to unknown domains following a Simple Locator page visit
New WordPress administrator accounts or modified user roles without a corresponding audit trail
Web server access logs showing suspicious referrers pointing to the Simple Locator plugin pages

Detection Strategies

Inspect WordPress access logs for requests to simple-locator URLs containing HTML or JavaScript metacharacters
Deploy a Web Application Firewall (WAF) rule that flags reflected payloads in query parameters
Monitor for anomalous Document Object Model (DOM) changes on plugin-rendered pages using browser-side Content Security Policy (CSP) reporting

Monitoring Recommendations

Enable WordPress audit logging to capture administrator session activity and configuration changes
Forward web server and WAF logs to a centralized analytics platform for correlation against known XSS payload patterns
Alert on outbound HTTP requests from authenticated admin sessions to newly registered or low-reputation domains

How to Mitigate CVE-2025-22513

Immediate Actions Required

Identify all WordPress sites running Simple Locator and confirm the installed version against 2.0.4
Update the Simple Locator plugin to a patched release once published by the vendor
Deactivate and remove the plugin if a patched version is not available and the functionality is non-essential
Force a password reset and session invalidation for all WordPress administrators on affected sites

Patch Information

No patched version was identified in the available advisory data at the time of publication. Refer to the PatchStack XSS Vulnerability Report for updates on vendor remediation.

Workarounds

Configure a WAF rule to block requests containing script tags or JavaScript event handlers in parameters processed by Simple Locator
Apply a strict Content Security Policy (CSP) that disallows inline scripts and restricts script sources to trusted origins
Restrict access to WordPress administrative pages by IP allowlist where operationally feasible
Train administrators to avoid clicking unsolicited links pointing to their own WordPress instance

bash

# Example NGINX rule to block reflected XSS payloads targeting Simple Locator
location ~* /wp-content/plugins/simple-locator/ {
    if ($args ~* "(<|%3C)script|javascript:|onerror=|onload=") {
        return 403;
    }
}