CVE-2025-53995: JetPopup Stored XSS Vulnerability

CVE-2025-53995 Overview

CVE-2025-53995 is a stored Cross-Site Scripting (XSS) vulnerability in the Crocoblock JetPopup plugin for WordPress. The flaw affects all versions up to and including 2.0.15.1. Attackers with low-privileged authenticated access can inject persistent malicious scripts into popup content. When administrators or visitors render the affected pages, the injected payload executes in their browser context. The weakness is tracked under CWE-79 and requires user interaction to trigger. Successful exploitation can lead to session theft, administrative account takeover, and defacement of pages served through the plugin.

Critical Impact
Authenticated attackers can store JavaScript payloads that execute against site visitors and administrators, crossing privilege boundaries through the WordPress rendering pipeline.

Affected Products

Crocoblock JetPopup plugin for WordPress
JetPopup versions from n/a through 2.0.15.1
WordPress sites running the vulnerable plugin configuration

Discovery Timeline

2025-07-16 - CVE-2025-53995 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-53995

Vulnerability Analysis

The vulnerability stems from improper neutralization of user-supplied input during web page generation. JetPopup accepts input through plugin-controlled fields that are later rendered in the DOM without adequate sanitization or output encoding. An authenticated contributor-level user can submit crafted input containing HTML or JavaScript. The payload persists in the WordPress database and executes whenever the popup is rendered. Because the scope is marked as changed, the injected script runs in the security context of the viewing user rather than the attacker. Administrators who preview or edit affected popups can trigger execution of attacker-controlled code with their session privileges.

Root Cause

The root cause is missing input validation and output encoding on fields consumed by the JetPopup rendering engine. Input is stored verbatim and reflected into page output without passing through WordPress sanitization helpers such as wp_kses_post or esc_html. This allows HTML tag injection with executable attributes like onerror, onload, or inline <script> elements.

Attack Vector

Exploitation requires an authenticated account with permissions to edit popup content and relies on a victim rendering the stored payload. The attack is delivered over the network through standard HTTP requests to the WordPress admin or front-end. Once stored, the payload fires on every subsequent view, enabling persistent compromise of browser sessions.

No verified public proof-of-concept is available at the time of writing. Refer to the Patchstack JetPopup XSS Vulnerability advisory for the full technical reference.

Detection Methods for CVE-2025-53995

Indicators of Compromise

Unexpected <script> tags, javascript: URIs, or event-handler attributes stored within JetPopup records in the wp_postmeta or options tables.
Outbound requests from administrator browsers to unknown domains immediately after loading popup edit screens.
New or modified WordPress administrator accounts shortly after rendering a compromised popup.

Detection Strategies

Review the wp_posts and wp_postmeta tables for JetPopup entries containing HTML control characters or script tokens.
Monitor web server access logs for authenticated POST requests to JetPopup REST or AJAX endpoints with payloads containing encoded script fragments.
Deploy a web application firewall rule to flag stored content containing <script, onerror=, or onload= in plugin-managed fields.

Monitoring Recommendations

Alert on new WordPress administrator role assignments and plugin or theme installations.
Correlate browser Content Security Policy (CSP) violation reports with WordPress admin page views.
Track changes to JetPopup content with file integrity and database auditing tooling.

How to Mitigate CVE-2025-53995

Immediate Actions Required

Update the Crocoblock JetPopup plugin to a version later than 2.0.15.1 once released by the vendor.
Audit all existing popups for injected HTML or JavaScript and remove suspicious content.
Restrict popup editing permissions to trusted administrator accounts only.
Rotate credentials and session tokens for any administrator who accessed affected popups.

Patch Information

Consult the Patchstack advisory for current patch availability. The advisory lists affected versions through 2.0.15.1 and tracks the fixed release once Crocoblock publishes it. Apply plugin updates through the standard WordPress plugin manager and verify the installed version in the admin dashboard.

Workarounds

Temporarily deactivate the JetPopup plugin until a patched version is deployed.
Enforce a strict Content Security Policy that disallows inline script execution on WordPress pages.
Place the WordPress admin interface behind a web application firewall configured to block XSS payloads in request bodies.

bash

# Configuration example: restrict admin access and update plugin via WP-CLI
wp plugin update jet-popup
wp plugin deactivate jet-popup   # if no patch is available yet
wp user list --role=administrator --fields=ID,user_login,user_email