CVE-2025-26583: Video Share VOD XSS Vulnerability

CVE-2025-26583 Overview

CVE-2025-26583 is a reflected cross-site scripting (XSS) vulnerability in the VideoWhisper Video Share VOD plugin for WordPress. The flaw affects all plugin versions up to and including 2.7.9. It stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. An attacker can craft a malicious URL that, when clicked by an authenticated user or visitor, executes arbitrary JavaScript in the victim's browser context. The vulnerability requires user interaction and can lead to session theft, credential harvesting, or unauthorized actions performed on behalf of the victim.

Critical Impact

Attackers can execute arbitrary JavaScript in the victim's browser, enabling session hijacking, credential theft, and unauthorized actions across the affected WordPress site.

Affected Products

• VideoWhisper Video Share VOD plugin for WordPress
• All versions up to and including 2.7.9
• WordPress sites running the video-share-vod plugin

Discovery Timeline

• 2025-03-26 - CVE-2025-26583 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-26583

Vulnerability Analysis

The vulnerability is a reflected XSS issue in the VideoWhisper Video Share VOD WordPress plugin. The plugin fails to properly sanitize and encode user-controlled input before reflecting it back into HTTP responses. When a victim clicks a specially crafted link, the malicious payload is parsed by the browser and executed as JavaScript within the WordPress site's origin.

Reflected XSS requires user interaction, reflected in the attack vector requiring a victim to follow a malicious link. The scope is changed because the executed script runs in the security context of the vulnerable WordPress site, granting access to cookies, session tokens, and the DOM of other components hosted on the same origin. The exploit prediction score remains low, but exploitation is straightforward once a target is engaged.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. The plugin echoes request parameters into HTML output without applying contextual output encoding or input validation. WordPress provides helper functions such as esc_html(), esc_attr(), and wp_kses() for safe output, but the affected code paths in video-share-vod versions up to 2.7.9 do not consistently apply them.

Attack Vector

An attacker crafts a URL containing a JavaScript payload in a vulnerable parameter handled by the plugin. The attacker delivers the link through phishing, forum posts, or social engineering. When the victim visits the URL, the payload is reflected into the page response and executed by the browser. The attacker can then exfiltrate cookies, perform actions through the WordPress REST API as the victim, or pivot to administrative functions if the target holds elevated privileges.

No verified public exploit code is currently available. Refer to the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-26583

Indicators of Compromise

• Web server access logs containing requests to video-share-vod endpoints with URL-encoded <script> tags, javascript: URIs, or HTML event handlers such as onerror= and onload=.
• Unexpected outbound requests from user browsers to attacker-controlled domains shortly after visiting the WordPress site.
• Anomalous administrative actions performed from user sessions without corresponding login activity.

Detection Strategies

• Inspect HTTP request parameters submitted to plugin handlers for reflected XSS payload patterns including angle brackets, encoded equivalents, and JavaScript URI schemes.
• Deploy a Web Application Firewall (WAF) with rules tuned to identify reflected XSS payloads targeting WordPress plugin parameters.
• Review WordPress audit logs for the installed version of video-share-vod and confirm whether it is 2.7.9 or earlier.

Monitoring Recommendations

• Monitor referrer headers and request parameters for suspicious payloads delivered through external links.
• Alert on Content Security Policy (CSP) violation reports indicating inline script execution attempts on plugin-served pages.
• Track plugin file modifications and version changes through file integrity monitoring on the wp-content/plugins/video-share-vod/ directory.

How to Mitigate CVE-2025-26583

Immediate Actions Required

• Audit WordPress installations to identify any sites running the VideoWhisper Video Share VOD plugin at version 2.7.9 or earlier.
• Deactivate the video-share-vod plugin until a patched release is installed if the plugin is not business-critical.
• Apply a restrictive Content Security Policy to limit the impact of script injection on WordPress front-end pages.

Patch Information

At the time of publication, the vendor advisory indicates that the vulnerability affects versions through 2.7.9. Administrators should consult the Patchstack Vulnerability Report and the WordPress plugin repository for the latest fixed version and update the plugin immediately upon availability.

Workarounds

• Restrict access to plugin endpoints using web server access controls or WAF rules until a patched release is applied.
• Enforce a strict Content Security Policy that disallows inline scripts and external script sources not explicitly trusted.
• Educate administrators and editors to avoid clicking unsolicited links pointing to the WordPress site, particularly those with unusual query parameters.

# Example nginx rule to block requests containing common XSS payload patterns
if ($args ~* "(<|%3C)script|javascript:|onerror=|onload=") {
    return 403;
}