CVE-2025-30778: VPSUForm v-form XSS Vulnerability

CVE-2025-30778 Overview

CVE-2025-30778 is a reflected Cross-Site Scripting (XSS) vulnerability affecting the Vikas Ratudi VPSUForm v-form WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Attackers can craft malicious URLs that, when clicked by an authenticated or unauthenticated victim, execute arbitrary JavaScript in the victim's browser session. The vulnerability affects all VPSUForm versions up to and including 3.1.9. Because the scope changes (S:C), injected scripts can impact resources beyond the vulnerable component, including the administrative interface.

Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in a victim's browser, enabling session hijacking, credential theft, and unauthorized actions within the WordPress site.

Affected Products

Vikas Ratudi VPSUForm v-form plugin for WordPress
All versions from initial release through 3.1.9
WordPress sites with the vulnerable plugin installed and activated

Discovery Timeline

2025-04-01 - CVE-2025-30778 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-30778

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in the VPSUForm v-form plugin. The plugin accepts user-controlled input through HTTP request parameters and reflects that input back into the rendered HTML response without proper sanitization or output encoding. An attacker who tricks a user into clicking a crafted link can execute arbitrary JavaScript in the target's browser under the origin of the affected WordPress site.

The attack requires user interaction (UI:R), typically through a phishing link or malicious referrer. The scope is classified as changed, meaning the injected payload can affect components beyond the immediately vulnerable plugin. The EPSS score places this CVE in the 71st percentile, indicating moderate exploit likelihood relative to other published vulnerabilities.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. The plugin fails to apply WordPress sanitization functions such as esc_html(), esc_attr(), or wp_kses() to data echoed back to the browser. As a result, HTML and JavaScript supplied via request parameters are rendered verbatim within the response page.

Attack Vector

The attack vector is network-based and requires no privileges. An attacker constructs a URL targeting a vulnerable endpoint of the v-form plugin with JavaScript embedded in a reflected parameter. When a victim loads the URL, the browser executes the script in the context of the WordPress origin. If the victim is an administrator, the attacker can perform privileged actions such as creating new admin accounts, modifying plugin settings, or injecting persistent backdoors.

No verified public proof-of-concept code is available. Refer to the Patchstack Vulnerability Report for further technical details.

Detection Methods for CVE-2025-30778

Indicators of Compromise

HTTP request logs containing <script>, javascript:, onerror=, or onload= patterns in query parameters targeting v-form endpoints
Unexpected outbound requests from administrator browsers to attacker-controlled domains shortly after visiting plugin pages
Unauthorized creation of WordPress administrator accounts or modification of user roles
Anomalous referrer headers pointing to external phishing or redirector domains

Detection Strategies

Inspect web server access logs for URL-encoded XSS payloads targeting VPSUForm parameters
Deploy a Web Application Firewall (WAF) rule set that flags reflected script content in HTTP responses
Monitor WordPress audit logs for unexpected administrative configuration changes

Monitoring Recommendations

Enable verbose access logging on WordPress front-end and wp-admin endpoints
Centralize WordPress logs into a SIEM and alert on suspicious query strings containing HTML or script tags
Track plugin version inventory across WordPress deployments to identify hosts running v-form<= 3.1.9

How to Mitigate CVE-2025-30778

Immediate Actions Required

Identify all WordPress instances running the VPSUForm v-form plugin version 3.1.9 or earlier
Deactivate the plugin until a patched version is verified and deployed
Force password resets for WordPress administrator accounts if exploitation is suspected
Review WordPress user lists and remove any unauthorized accounts

Patch Information

At the time of the latest NVD update, no fixed version is identified in the available references. Administrators should monitor the Patchstack Vulnerability Report and the vendor's plugin page for an updated release beyond 3.1.9.

Workarounds

Remove or deactivate the v-form plugin until a vendor patch is released
Apply WAF rules that block HTTP requests containing XSS payload patterns targeting plugin endpoints
Enforce a strict Content Security Policy (CSP) that disallows inline scripts and unauthorized external script sources
Restrict administrator access to trusted networks and require multi-factor authentication for wp-admin

bash

# Example WAF rule (ModSecurity) to block reflected XSS payloads on v-form endpoints
SecRule REQUEST_URI "@contains /wp-content/plugins/v-form/" \
  "chain,phase:2,deny,status:403,id:1003078,msg:'Block VPSUForm XSS attempt CVE-2025-30778'"
  SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" "t:urlDecodeUni,t:lowercase"