CVE-2025-50027 Overview
CVE-2025-50027 is a stored Cross-Site Scripting (XSS) vulnerability in the xootix Login/Signup Popup plugin for WordPress, distributed as easy-login-woocommerce. The flaw affects all plugin versions up to and including 2.9.4. It stems from improper neutralization of user-supplied input during web page generation, categorized under [CWE-79].
An authenticated attacker with high privileges can inject persistent JavaScript payloads that execute in the browsers of other users who view the affected pages. The scope change means the injected script can affect components beyond the vulnerable plugin itself.
Critical Impact
Stored JavaScript payloads execute in victim browsers, enabling session theft, administrative action forgery, and pivoting into the WordPress admin context.
Affected Products
- xootix Login/Signup Popup (easy-login-woocommerce) plugin for WordPress
- All versions from initial release through 2.9.4
- WordPress sites using the plugin alongside WooCommerce authentication flows
Discovery Timeline
- 2025-06-20 - CVE-2025-50027 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-50027
Vulnerability Analysis
The vulnerability is a stored XSS flaw in the Login/Signup Popup plugin. User-controlled input is written to persistent storage and later rendered in HTML output without adequate sanitization or output encoding. Because the payload is stored server-side, it executes automatically for every user who loads the affected page.
Exploitation requires an authenticated account with high privileges and a user interaction from the victim. Successful attacks can hijack sessions, perform actions on behalf of administrators, or redirect users to attacker-controlled infrastructure. The scope change indicates the payload's impact crosses the vulnerable component's security boundary into the broader WordPress environment.
Root Cause
The plugin fails to apply WordPress sanitization primitives such as sanitize_text_field() on input or esc_html() and esc_attr() on output. Attacker-controlled values persist in the database and are echoed into HTML contexts as raw markup, allowing <script> and event-handler payloads to execute in the DOM.
Attack Vector
An attacker authenticates with an account holding elevated privileges within the plugin's administrative surface. The attacker submits a payload containing JavaScript into a plugin field that is stored and later rendered in another user's session. When a victim, typically an administrator or customer, loads a page rendering the stored value, the browser executes the payload under the site's origin.
The vulnerability mechanism is detailed in the Patchstack XSS Vulnerability Advisory. No verified public proof-of-concept code is available.
Detection Methods for CVE-2025-50027
Indicators of Compromise
- Unexpected <script> tags, on* event handlers, or javascript: URIs stored in WordPress wp_options or wp_postmeta entries associated with the plugin.
- Outbound requests from administrator browsers to unfamiliar domains shortly after loading pages rendered by easy-login-woocommerce.
- New WordPress administrator accounts or modified user roles created without a corresponding admin action in audit logs.
Detection Strategies
- Query the WordPress database for plugin-owned rows containing HTML control characters or script keywords such as <script, onerror=, or onload=.
- Deploy a web application firewall rule to flag responses from plugin-rendered endpoints containing inline script that references external hosts.
- Correlate authenticated session activity with anomalous DOM-initiated network requests using endpoint or browser telemetry.
Monitoring Recommendations
- Enable and review WordPress audit logs for changes to plugin settings by high-privilege accounts.
- Monitor privileged user session behavior for indicators of session token exfiltration or unexpected administrative actions.
- Track plugin version inventory across WordPress hosts to identify unpatched instances of easy-login-woocommerce at or below 2.9.4.
How to Mitigate CVE-2025-50027
Immediate Actions Required
- Update the Login/Signup Popup plugin to a version released after 2.9.4 as soon as a patched build is available from the vendor.
- Audit the WordPress database for stored payloads containing script tags or JavaScript event handlers in plugin-owned fields and remove any malicious entries.
- Rotate credentials and session tokens for any administrator accounts that may have loaded a compromised page.
Patch Information
Refer to the Patchstack XSS Vulnerability Advisory for the current patch status and the fixed version. Apply the vendor-supplied update through the WordPress plugin manager or via wp-cli using wp plugin update easy-login-woocommerce.
Workarounds
- Deactivate the Login/Signup Popup plugin until a patched version is installed if the functionality is not business-critical.
- Restrict high-privilege plugin administration to a minimal set of accounts and enforce multi-factor authentication for those accounts.
- Deploy a Content Security Policy that disallows inline scripts and untrusted external script sources to reduce stored XSS execution impact.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
