CVE-2026-57381: PropertyHive XSS Vulnerability

CVE-2026-57381 Overview

CVE-2026-57381 is a reflected Cross-Site Scripting (XSS) vulnerability [CWE-79] in the PropertyHive plugin for WordPress. The flaw affects all versions of PropertyHive up to and including 2.2.3. Attackers can craft malicious URLs that execute arbitrary JavaScript in the browser of any user who follows the link. Because the vulnerability changes security scope, code executes in the context of the vulnerable WordPress site and can access session data, authentication cookies, and page content.

Critical Impact
Successful exploitation lets attackers steal session tokens, perform actions as the victim, deface content, or redirect users to attacker-controlled infrastructure.

Affected Products

Property Hive PropertyHive plugin for WordPress
All versions from n/a through 2.2.3
WordPress sites running the vulnerable plugin

Discovery Timeline

2026-07-13 - CVE-2026-57381 published to NVD
2026-07-13 - Last updated in NVD database

Technical Details for CVE-2026-57381

Vulnerability Analysis

The PropertyHive plugin fails to properly neutralize user-supplied input before including it in dynamically generated web pages. The plugin reflects request parameters back into HTML responses without adequate encoding or sanitization. An attacker who convinces a victim to click a crafted link can inject arbitrary HTML and JavaScript into the rendered page.

The scope change indicates that injected script executes with access to resources beyond the vulnerable component. In practice, this means the payload can interact with the broader WordPress DOM, including authenticated session cookies not marked HttpOnly and any exposed administrative interfaces the victim can access.

Exploitation requires user interaction. The attacker must deliver the malicious URL through phishing, forum posts, social media, or search engine poisoning. No prior authentication is required to construct the payload, which broadens the attacker pool to any anonymous user on the internet.

Root Cause

The root cause is improper neutralization of input during web page generation. The plugin echoes request data into HTML output without applying context-appropriate escaping such as esc_html(), esc_attr(), or wp_kses(). WordPress provides sanitization APIs specifically for this purpose, but the vulnerable code paths bypass them.

Attack Vector

The attack proceeds over the network with low complexity. An attacker crafts a URL targeting a vulnerable PropertyHive endpoint and embeds a JavaScript payload in a reflected parameter. The attacker then delivers the URL to a victim through email, chat, or a malicious page. When the victim loads the URL, the browser renders the injected script within the trust context of the WordPress site. The script can exfiltrate cookies, submit forged requests to administrative endpoints, or rewrite page content to phish credentials.

Refer to the Patchstack WordPress Vulnerability Report for additional technical details.

Detection Methods for CVE-2026-57381

Indicators of Compromise

Web server access logs containing PropertyHive request parameters with <script>, javascript:, onerror=, or onload= substrings
URL-encoded payloads such as %3Cscript%3E targeting PropertyHive endpoints
Outbound requests from administrator browsers to unfamiliar domains shortly after visiting PropertyHive pages
Unexpected creation of WordPress administrator accounts or modifications to plugin settings

Detection Strategies

Inspect HTTP request and response bodies for reflected script content in PropertyHive parameters
Deploy web application firewall rules that flag common XSS signatures against WordPress plugin paths
Correlate referer headers and click patterns to identify phishing campaigns delivering malicious URLs
Enable WordPress audit logging to track privileged actions that follow suspicious page loads

Monitoring Recommendations

Monitor the PropertyHive plugin version across all WordPress installations and alert on versions at or below 2.2.3
Track anomalous authenticated sessions originating from administrator accounts, including new IP addresses and user-agent strings
Review browser console errors and Content Security Policy violation reports for signs of injection attempts

How to Mitigate CVE-2026-57381

Immediate Actions Required

Update the PropertyHive plugin to a version later than 2.2.3 as soon as the vendor publishes a fix
If no patched version is available, deactivate and remove the PropertyHive plugin until a fix is released
Rotate WordPress administrator passwords and invalidate active sessions if exploitation is suspected
Review WordPress user accounts for unauthorized additions or role escalations

Patch Information

Consult the Patchstack WordPress Vulnerability Report for the current patch status and upgrade guidance. Apply updates through the WordPress plugin manager or by replacing the plugin directory with the patched release.

Workarounds

Deploy a web application firewall with rules that block reflected XSS payloads targeting WordPress plugin endpoints
Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Restrict access to WordPress administrative pages by IP allowlist while the plugin remains unpatched
Train administrators to avoid clicking untrusted links that reference the WordPress site

bash

# Example Content Security Policy header for Nginx
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self';" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "SAMEORIGIN" always;