CVE-2025-32165: Doppler Forms Stored XSS Vulnerability

CVE-2025-32165 Overview

CVE-2025-32165 is a stored Cross-Site Scripting (XSS) vulnerability in the Doppler Forms WordPress plugin (doppler-form) developed by fromdoppler. The flaw affects all plugin versions up to and including 2.5.1. An authenticated attacker with low privileges can inject persistent JavaScript payloads that execute in the browsers of users who view the affected pages. The vulnerability is classified under CWE-79, Improper Neutralization of Input During Web Page Generation.

Critical Impact
Stored XSS enables session hijacking, credential theft, and administrative account takeover when a WordPress administrator views the injected content.

Affected Products

fromdoppler Doppler Forms (doppler-form) plugin for WordPress
All versions from initial release through 2.5.1
WordPress installations running the vulnerable plugin

Discovery Timeline

2025-04-04 - CVE-2025-32165 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-32165

Vulnerability Analysis

The Doppler Forms plugin fails to properly neutralize user-supplied input before rendering it within generated web pages. Attacker-controlled data is stored server-side and later reflected into the DOM without adequate encoding or sanitization. When a victim loads the affected page, the browser parses the injected markup and executes attacker-controlled JavaScript in the WordPress site's origin.

The scope changes from the vulnerable component to the victim's browser session, which allows the payload to affect resources beyond the plugin itself. Exploitation requires an authenticated user with low privileges to submit the malicious payload, and a second user must render the page for the script to execute. The Exploit Prediction Scoring System places the current exploitation probability at 0.392% (percentile 33.1).

Root Cause

The plugin does not enforce output encoding when rendering stored form data into HTML contexts. Missing calls to WordPress escaping APIs such as esc_html(), esc_attr(), or wp_kses_post() allow raw <script> tags and event handler attributes to persist through the storage and rendering pipeline.

Attack Vector

An authenticated contributor-level or subscriber-level user submits crafted input through a form field managed by the plugin. The payload is stored in the WordPress database. When an administrator or other privileged user views the entry through the WordPress admin interface, the script executes with that user's session context, enabling cookie theft, forced administrative actions, or persistent backdoor creation via plugin installation.

The vulnerability manifests in the plugin's form data rendering routines. See the Patchstack XSS Vulnerability Report for additional technical details.

Detection Methods for CVE-2025-32165

Indicators of Compromise

Unexpected <script> tags, javascript: URIs, or DOM event handlers (onerror, onload, onmouseover) stored in Doppler Forms database entries
Outbound HTTP requests from administrator browsers to unfamiliar domains shortly after loading form data pages
New WordPress administrator accounts or unauthorized plugin installations following admin sessions
Modified WordPress options or theme files timestamped alongside admin form review activity

Detection Strategies

Query the wp_options and plugin-specific tables for stored form submissions containing HTML tags or JavaScript keywords
Inspect WordPress access logs for POST requests to Doppler Forms endpoints followed by admin GET requests to review pages
Deploy Content Security Policy (CSP) reporting to surface inline script execution attempts on wp-admin pages

Monitoring Recommendations

Alert on creation of new administrator accounts or role changes outside change-management windows
Monitor plugin installation and modification events through WordPress audit logs
Track outbound network connections from workstations used for WordPress administration

How to Mitigate CVE-2025-32165

Immediate Actions Required

Identify all WordPress sites running the Doppler Forms plugin at version 2.5.1 or earlier
Update the doppler-form plugin to a patched release once available from the vendor
Restrict form submission capabilities to trusted authenticated roles until patched
Audit stored form submissions for existing malicious payloads and purge suspicious entries

Patch Information

At the time of this writing, the vendor advisory is tracked through Patchstack. Administrators should consult the Patchstack XSS Vulnerability Report for the latest patched version and remediation guidance.

Workarounds

Deactivate the Doppler Forms plugin until a fixed release is deployed
Deploy a Web Application Firewall (WAF) rule to strip HTML tags from Doppler Forms submission parameters
Enforce a strict Content Security Policy that blocks inline script execution on WordPress admin pages
Rotate administrator credentials and invalidate active sessions if compromise is suspected

bash

# Example WordPress CLI commands to deactivate the vulnerable plugin
wp plugin deactivate doppler-form
wp plugin status doppler-form