CVE-2025-31028: WP Hide Categories XSS Vulnerability

CVE-2025-31028 Overview

CVE-2025-31028 is a reflected cross-site scripting (XSS) vulnerability in the Huseyin Berberoglu WP Hide Categories WordPress plugin. The flaw stems from improper neutralization of user-controlled input during web page generation [CWE-79]. All versions of wp-hide-categories up to and including 1.0 are affected.

An attacker can craft a malicious URL containing JavaScript payloads. When a victim clicks the link, the payload executes in the victim's browser within the context of the vulnerable WordPress site. Successful exploitation requires user interaction but no authentication.

Critical Impact

Reflected XSS allows attackers to execute arbitrary JavaScript in victim browsers, enabling session theft, credential harvesting, and administrative action hijacking through crafted links.

Affected Products

• Huseyin Berberoglu WP Hide Categories plugin for WordPress
• All versions through 1.0 (inclusive)
• WordPress sites with the plugin installed and activated

Discovery Timeline

• 2025-04-11 - CVE-2025-31028 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-31028

Vulnerability Analysis

The WP Hide Categories plugin fails to sanitize or encode user-supplied input before reflecting it into rendered HTML output. This results in a reflected XSS condition classified under [CWE-79]. The attack vector is network-based and requires victim interaction such as clicking a malicious link.

The vulnerability operates with a changed scope, meaning the injected script can affect resources beyond the vulnerable component. This includes access to cookies, session tokens, and Document Object Model (DOM) content rendered by the WordPress administration interface or front-end pages.

Root Cause

The root cause lies in the plugin's handling of request parameters that are echoed back into HTML responses without proper output encoding. WordPress provides functions such as esc_html(), esc_attr(), and wp_kses() for safe output rendering. The affected plugin code paths do not apply these neutralization routines before emitting input into the response body.

Attack Vector

An attacker constructs a URL containing a JavaScript payload within a vulnerable parameter handled by the plugin. The attacker delivers this URL through phishing emails, forum posts, or social media. When a target clicks the link while authenticated to the WordPress site, the browser executes the script in the site's origin. The attacker can then steal session cookies, perform actions as the victim, or pivot to administrative compromise if an administrator is targeted.

No public proof-of-concept exploit is currently available. Refer to the Patchstack WP Hide Categories Vulnerability advisory for additional technical context.

Detection Methods for CVE-2025-31028

Indicators of Compromise

• HTTP requests to WordPress endpoints containing <script>, javascript:, or HTML event handlers such as onerror= and onload= in query parameters
• URL-encoded payload patterns such as %3Cscript%3E or %3Cimg reaching plugin-handled routes
• Unexpected outbound requests from administrator browsers to attacker-controlled domains shortly after clicking external links

Detection Strategies

• Inspect web server access logs for requests targeting wp-hide-categories parameters with suspicious payloads
• Deploy Web Application Firewall (WAF) signatures that flag XSS payload patterns in query strings and POST bodies
• Monitor browser-side Content Security Policy (CSP) violation reports for injected inline script execution

Monitoring Recommendations

• Centralize WordPress access logs and apply correlation rules for reflected XSS payload signatures
• Alert on administrator session token usage from unexpected IP addresses or user agents
• Track plugin inventory and version data across WordPress fleets to identify hosts running wp-hide-categories version 1.0 or earlier

How to Mitigate CVE-2025-31028

Immediate Actions Required

• Deactivate and remove the WP Hide Categories plugin from all WordPress installations until a fixed release is available
• Audit WordPress sites for the presence of wp-hide-categories across multi-site environments
• Force password resets and session invalidation for administrators who may have interacted with suspicious links

Patch Information

No official patched version is referenced in the available advisory data. The Patchstack advisory lists the vulnerability as affecting versions through 1.0. Site operators should monitor the Patchstack WP Hide Categories Vulnerability advisory for patch release information.

Workarounds

• Remove or disable the WP Hide Categories plugin as the most reliable mitigation
• Deploy a WAF with XSS payload filtering rules in front of WordPress sites
• Enforce a strict Content Security Policy that disables inline script execution and restricts script sources to trusted origins
• Train administrators to avoid clicking unsolicited links to WordPress administrative URLs

# Example: disable the plugin via WP-CLI
wp plugin deactivate wp-hide-categories
wp plugin delete wp-hide-categories