CVE-2025-15669 Overview
CVE-2025-15669 is a stored Cross-Site Scripting (XSS) vulnerability [CWE-79] in the Bit Form WordPress plugin before version 3.1.4. The plugin fails to sanitize one of its conversational-form display settings before rendering it on the public-facing form. High-privilege users such as administrators can inject JavaScript that executes in the browser of any visitor who views the affected form. On WordPress multisite installations, administrators do not hold the unfiltered_html capability, so this behavior constitutes a privilege boundary violation.
Critical Impact
Authenticated high-privilege users can persist arbitrary JavaScript in Bit Form conversational-form settings, executing in every visitor's browser session.
Affected Products
- Bit Form WordPress plugin versions prior to 3.1.4
- WordPress multisite deployments where administrators lack the unfiltered_html capability
- Public-facing forms rendered through the plugin's conversational-form display
Discovery Timeline
- 2026-08-01 - CVE-2025-15669 published to NVD
- 2026-08-03 - Last updated in NVD database
Technical Details for CVE-2025-15669
Vulnerability Analysis
The vulnerability resides in the Bit Form plugin's handling of conversational-form display settings. The plugin stores administrator-supplied configuration values and later renders them on the public form output. One of these settings is written to the page without output encoding or input sanitization. Any script payload placed in the vulnerable field becomes part of the rendered HTML.
Because the payload is stored in the WordPress database, every visitor who loads the form triggers execution. This makes the flaw a persistent (stored) XSS rather than a reflected one. The attacker's script runs in the origin of the WordPress site, giving it access to cookies, session state, and DOM content visible to the victim.
Exploitation requires authentication with high privileges and user interaction from the victim who views the form. The scope changes because injected script executes in visitor browsers rather than the attacker's own context.
Root Cause
The root cause is missing output escaping on a conversational-form display setting. WordPress provides functions such as esc_html(), esc_attr(), and wp_kses() for context-appropriate encoding. The plugin renders the stored setting into HTML without applying these controls. Server-side input sanitization on save is also absent for the affected field.
Attack Vector
An authenticated administrator navigates to the Bit Form plugin's form editor and configures the affected conversational-form display setting with a JavaScript payload. The plugin persists the raw value to the database. When any site visitor loads a page containing the form, the browser parses the injected markup and executes the script in the site's origin. On multisite installations, this lets a per-site administrator bypass the unfiltered_html restriction that the platform enforces on that role.
Because no verified public exploit code is available, technical specifics of the affected setting are described in the WPScan Vulnerability Report.
Detection Methods for CVE-2025-15669
Indicators of Compromise
- Bit Form plugin versions earlier than 3.1.4 present in wp-content/plugins/bit-form/
- Bit Form form configuration records containing <script>, on*= event handlers, or javascript: URIs in conversational-form settings
- Unexpected outbound requests from visitor browsers to attacker-controlled domains referenced by injected payloads
- Administrator account activity editing form settings shortly before anomalous client-side telemetry
Detection Strategies
- Query the WordPress options and postmeta tables for Bit Form entries and inspect stored display settings for HTML or script tokens
- Review WordPress audit logs for edits to Bit Form configurations by administrator accounts, particularly on multisite hosts
- Monitor browser telemetry, Content Security Policy (CSP) reports, and web application firewall logs for script execution or blocked inline scripts on pages hosting Bit Form forms
Monitoring Recommendations
- Alert on installation of Bit Form plugin versions below 3.1.4 across managed WordPress fleets
- Track new administrator logins on multisite deployments and correlate with plugin configuration changes
- Baseline expected HTML output from public form pages and flag deviations that introduce inline <script> elements
How to Mitigate CVE-2025-15669
Immediate Actions Required
- Update the Bit Form plugin to version 3.1.4 or later on all WordPress sites
- Audit stored Bit Form configurations for existing script payloads and remove any unauthorized entries
- Restrict administrator account creation on multisite installations and enforce multi-factor authentication
Patch Information
The vendor addressed CVE-2025-15669 in Bit Form version 3.1.4. Upgrading to this release or later applies proper output escaping to the affected conversational-form display setting. Refer to the WPScan Vulnerability Report for advisory details.
Workarounds
- Deactivate the Bit Form plugin until the upgrade to 3.1.4 or later is completed
- Deploy a Content Security Policy that disallows inline scripts on pages rendering Bit Form output to limit exploitation impact
- Limit administrator role assignments on multisite deployments to trusted operators only
# Update Bit Form to the patched release using WP-CLI
wp plugin update bit-form --version=3.1.4
wp plugin list --name=bit-form --fields=name,status,version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
