CVE-2025-26989 Overview
CVE-2025-26989 is a stored cross-site scripting (XSS) vulnerability in the Softdiscover Zigaform Form Builder Lite plugin for WordPress. The flaw affects all plugin versions up to and including 7.4.2. It stems from improper neutralization of user-supplied input during web page generation, classified as [CWE-79]. An attacker with low network access can inject malicious script content that persists in the application and executes when a victim loads the affected page. The scope change in the CVSS vector indicates that injected scripts can impact resources beyond the vulnerable component, such as the browser session context of authenticated users.
Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in a victim's browser, enabling session theft, credential harvesting, and unauthorized actions in the WordPress administrative context.
Affected Products
- Softdiscover Zigaform Form Builder Lite WordPress plugin
- All versions from initial release through 7.4.2
- WordPress sites with the zigaform-form-builder-lite plugin installed and active
Discovery Timeline
- 2025-03-03 - CVE-2025-26989 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-26989
Vulnerability Analysis
The vulnerability is a stored XSS flaw in the Zigaform Form Builder Lite plugin. Stored XSS occurs when an application accepts user input, saves it to persistent storage, and later renders it in a web page without adequate output encoding or input sanitization. In this case, the plugin fails to properly neutralize input during web page generation, allowing attacker-controlled script content to reach the Document Object Model (DOM) of pages viewed by other users.
Because the CVSS vector defines a changed scope (S:C), the injected payload can affect resources beyond the plugin itself. WordPress administrators who view an infected form submission or configuration page may unknowingly execute the payload with their session privileges. The vector requires user interaction (UI:R), meaning a victim must load or interact with the page containing the malicious content. No authentication is required to inject the payload.
Root Cause
The root cause is missing or insufficient sanitization of user-supplied input before it is stored and later rendered in the WordPress interface. The plugin does not apply appropriate escaping functions such as esc_html(), esc_attr(), or wp_kses() to input that flows from form submission handlers into rendered pages.
Attack Vector
An unauthenticated attacker submits crafted input containing HTML or JavaScript payloads through a form or configuration field exposed by the plugin. The malicious content is stored in the WordPress database. When an administrator or other privileged user later views a page that displays the tainted data, the browser parses and executes the injected script. The attacker can then hijack sessions, perform CSRF-style actions, or pivot to further compromise of the WordPress site.
// No verified proof-of-concept code is publicly available for this CVE.
// See the Patchstack advisory for additional technical details.
Detection Methods for CVE-2025-26989
Indicators of Compromise
- Unexpected <script> tags, event handlers (onerror, onload), or javascript: URIs stored within Zigaform form field records in the WordPress database
- Outbound HTTP requests from administrator browsers to unfamiliar domains shortly after loading plugin-generated pages
- New or modified WordPress administrator accounts created after an admin viewed a form submission page
Detection Strategies
- Inspect the wp_options and plugin-specific tables for stored HTML or JavaScript content in fields expected to contain plain text
- Enable Content Security Policy (CSP) reporting to capture inline script violations originating from plugin-rendered pages
- Correlate WordPress access logs with browser telemetry to identify anonymous form submissions followed by admin page views
Monitoring Recommendations
- Monitor WordPress audit logs for form submissions containing HTML entities, script tags, or encoded payloads
- Alert on modifications to user roles, plugin settings, or theme files following administrator interaction with Zigaform pages
- Track file integrity of the wp-content/plugins/zigaform-form-builder-lite/ directory to detect tampering
How to Mitigate CVE-2025-26989
Immediate Actions Required
- Update the Zigaform Form Builder Lite plugin to a version newer than 7.4.2 as soon as a patched release is available from the vendor
- If no patched version is available, deactivate and remove the plugin from all affected WordPress installations
- Audit existing form submissions and plugin configuration entries for stored script payloads and purge any malicious content
Patch Information
Refer to the Patchstack Vulnerability Report for the latest advisory information. At the time of publication, the vulnerability affects Zigaform versions through 7.4.2. Administrators should apply vendor updates when available.
Workarounds
- Deploy a Web Application Firewall (WAF) with rules that block common XSS payload patterns targeting WordPress plugin endpoints
- Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
- Restrict access to the WordPress administrative interface using IP allowlisting or VPN-only access to limit exposure of privileged sessions
# Example Content Security Policy header to mitigate XSS execution
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
