CVE-2025-31058: Revolution Video Player XSS Vulnerability

CVE-2025-31058 Overview

CVE-2025-31058 is a reflected Cross-Site Scripting (XSS) vulnerability in the LambertGroup Revolution Video Player plugin for WordPress. The flaw affects all versions up to and including 2.9.2. Attackers can inject malicious scripts into web pages generated by the plugin because user-controlled input is not properly neutralized [CWE-79]. Successful exploitation requires a victim to interact with a crafted link or page, after which the attacker's script executes in the victim's browser context. The scope is changed under the CVSS vector, meaning the impact can extend beyond the vulnerable component into other parts of the WordPress site.

Critical Impact

Attackers can execute arbitrary JavaScript in a victim's browser session, enabling cookie theft, session hijacking, and malicious redirects against WordPress site visitors and administrators.

Affected Products

• LambertGroup Revolution Video Player WordPress plugin (revolution_video_player)
• All versions from initial release through 2.9.2
• WordPress sites embedding the plugin on public-facing pages

Discovery Timeline

• 2025-06-09 - CVE-2025-31058 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-31058

Vulnerability Analysis

The Revolution Video Player plugin fails to sanitize or encode user-supplied input before reflecting it into HTTP responses. When a victim loads a crafted URL containing attacker-controlled payload data, the plugin renders that input directly into the resulting HTML page. The browser then parses and executes the injected JavaScript in the context of the WordPress site's origin.

Because this is a reflected XSS variant, the payload is delivered through a request parameter rather than stored in the database. The attacker must convince a target to click a crafted link or visit an attacker-controlled page that triggers the request. Once executed, the script inherits the victim's session, cookies, and same-origin permissions on the affected WordPress site.

Root Cause

The root cause is improper neutralization of input during web page generation. The plugin echoes request data into HTML output without applying output encoding functions such as esc_html(), esc_attr(), or wp_kses(). WordPress provides these escaping APIs specifically to prevent injection of executable markup, but the affected code paths bypass them.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker crafts a URL containing JavaScript payload data in a vulnerable parameter handled by the plugin. The attacker distributes this URL through phishing emails, malicious comments, social media, or compromised third-party sites. When an authenticated administrator or any site visitor clicks the link, the payload executes in their browser. Refer to the Patchstack advisory for additional technical context.

Detection Methods for CVE-2025-31058

Indicators of Compromise

• HTTP requests to Revolution Video Player endpoints containing <script>, javascript:, onerror=, or onload= substrings in query parameters
• Unusual outbound requests from administrator browser sessions to unfamiliar domains shortly after visiting WordPress pages
• Referer headers from external phishing domains followed by privileged actions in wp-admin

Detection Strategies

• Inspect web server access logs for encoded payload patterns such as %3Cscript%3E, %22%3E%3Csvg, and onerror%3D
• Deploy a Web Application Firewall (WAF) rule set targeting reflected XSS signatures against plugin URLs
• Monitor browser Content Security Policy (CSP) violation reports for inline script execution attempts on plugin-rendered pages

Monitoring Recommendations

• Alert on administrator account activity that occurs immediately after external referer clicks
• Track plugin version inventory across all managed WordPress sites and flag instances at version 2.9.2 or earlier
• Capture and review HTTP request parameters submitted to Revolution Video Player URL handlers

How to Mitigate CVE-2025-31058

Immediate Actions Required

• Identify all WordPress sites running the Revolution Video Player plugin at version 2.9.2 or earlier
• Apply the vendor-supplied patched release as soon as it becomes available from LambertGroup
• Restrict administrator browsing on systems with active WordPress administrative sessions
• Rotate WordPress administrator credentials and invalidate active sessions if exploitation is suspected

Patch Information

At time of publication, the Patchstack vulnerability database tracks this issue and should be consulted for the most current patched version from LambertGroup. Update the plugin through the WordPress admin dashboard once a fixed release is published.

Workarounds

• Deactivate and remove the Revolution Video Player plugin until a patched version is installed
• Deploy a WAF rule blocking requests containing script tags or JavaScript event handlers in parameters targeting plugin endpoints
• Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
• Require administrators to use dedicated browser profiles or sessions when accessing wp-admin

# Example nginx rule to block common reflected XSS payloads against the plugin path
location ~* /wp-content/plugins/revolution_video_player/ {
    if ($args ~* "(<|%3C)script|javascript:|onerror=|onload=") {
        return 403;
    }
}