CVE-2025-47521: Robo Gallery Stored XSS Vulnerability

CVE-2025-47521 Overview

CVE-2025-47521 is a stored cross-site scripting (XSS) vulnerability in the robosoft Robo Gallery plugin for WordPress. The flaw affects all plugin versions up to and including 5.0.2. The vulnerability results from improper neutralization of input during web page generation, categorized under [CWE-79].

An authenticated attacker with high privileges can inject persistent JavaScript payloads that execute in the browsers of users who view the affected pages. Successful exploitation requires user interaction and produces a scope change, allowing the injected script to affect resources beyond the vulnerable component.

Critical Impact

Stored XSS in Robo Gallery enables persistent script execution in visitor browsers, leading to session theft, administrative account takeover, and malicious redirection from trusted WordPress sites.

Affected Products

• robosoft Robo Gallery WordPress plugin (robo-gallery)
• All versions from initial release through 5.0.2
• WordPress sites with the plugin installed and active

Discovery Timeline

• 2025-05-07 - CVE-2025-47521 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-47521

Vulnerability Analysis

The vulnerability is a stored XSS flaw in the Robo Gallery WordPress plugin. The plugin fails to sanitize or escape user-supplied input before storing it and rendering it back within generated web pages. When a victim loads a page containing the malicious payload, the browser executes the attacker-controlled JavaScript in the context of the WordPress site.

The issue requires an authenticated actor with elevated privileges to inject the payload, and requires a subsequent user interaction to trigger execution. Because the impact crosses a security boundary, the payload can affect other users and components beyond the plugin itself, including administrative sessions.

Root Cause

The root cause is improper neutralization of input during web page generation ([CWE-79]). The plugin accepts input through gallery configuration fields or shortcode parameters and writes that input into HTML output without applying WordPress escaping functions such as esc_html(), esc_attr(), or wp_kses(). Stored data is rendered verbatim on the frontend or in the administrative interface.

Attack Vector

Exploitation occurs over the network. An attacker with existing high-privilege access to the WordPress backend, such as an editor or administrator account, submits a payload containing HTML or JavaScript through a gallery input field. The payload persists in the WordPress database. When another authenticated user views a page rendering the gallery, the browser executes the injected script under the site's origin, enabling cookie theft, session hijacking, arbitrary administrative actions, or redirection to attacker-controlled infrastructure.

No verified proof-of-concept code has been published. See the Patchstack WordPress Plugin Vulnerability advisory for additional technical context.

Detection Methods for CVE-2025-47521

Indicators of Compromise

• Gallery titles, captions, or configuration fields containing <script>, onerror=, onload=, or javascript: strings
• Unexpected outbound requests from browser sessions to unknown domains after loading gallery-enabled pages
• New or modified WordPress administrator accounts following administrative access to gallery pages
• Modifications to plugin options tables (wp_options, wp_postmeta) containing encoded HTML payloads

Detection Strategies

• Audit the WordPress database for gallery-related entries containing HTML event handlers or <script> tags
• Review web server access logs for POST requests to Robo Gallery administrative endpoints from unexpected accounts
• Deploy a web application firewall rule to flag payloads matching common XSS signatures in plugin request parameters
• Correlate authenticated administrative session activity with subsequent anomalous browser-initiated requests

Monitoring Recommendations

• Enable WordPress audit logging for content changes made by editor and administrator roles
• Monitor Content Security Policy (CSP) violation reports for inline script execution originating from gallery pages
• Alert on privilege changes and new user account creation immediately following high-privilege sessions
• Track plugin version inventory across WordPress deployments to identify vulnerable Robo Gallery installations

How to Mitigate CVE-2025-47521

Immediate Actions Required

• Identify all WordPress sites running Robo Gallery version 5.0.2 or earlier
• Restrict high-privilege WordPress accounts and enforce multi-factor authentication on editor and administrator roles
• Review recent gallery content and plugin configuration for injected HTML or JavaScript payloads
• Rotate session cookies and administrative credentials on any site where malicious payloads are found

Patch Information

At the time of publication, the vendor advisory tracked through Patchstack lists the vulnerability as affecting Robo Gallery through version 5.0.2. Administrators should upgrade to the latest available plugin version from the vendor or the WordPress plugin repository. If no patched version is available, consider removing the plugin.

Workarounds

• Deactivate and uninstall the Robo Gallery plugin until a patched version is confirmed available
• Deploy a web application firewall with XSS payload filtering in front of the WordPress site
• Apply a strict Content Security Policy that disallows inline script execution on pages rendering galleries
• Limit the number of accounts with editor or administrator privileges to reduce the attack surface

# Example: apply a Content-Security-Policy header via Apache to block inline scripts
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'"