CVE-2024-25597: Ultimate Reviews Stored XSS Vulnerability

CVE-2024-25597 Overview

CVE-2024-25597 is a stored Cross-Site Scripting (XSS) vulnerability in the Etoile Web Design Ultimate Reviews plugin for WordPress. The flaw stems from improper neutralization of user input during web page generation, classified as [CWE-79]. All versions of Ultimate Reviews up to and including 3.2.8 are affected. An unauthenticated attacker can inject malicious JavaScript that persists in the application and executes in the browser context of any user who views the affected page.

Critical Impact

Unauthenticated attackers can inject persistent JavaScript that executes in visitors' and administrators' browsers, enabling session theft, credential capture, and administrative account takeover on affected WordPress sites.

Affected Products

• Etoile Web Design Ultimate Reviews plugin for WordPress
• All versions from n/a through 3.2.8
• WordPress sites with the vulnerable plugin activated

Discovery Timeline

• 2024-03-15 - CVE-2024-25597 published to the National Vulnerability Database (NVD)
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-25597

Vulnerability Analysis

The Ultimate Reviews plugin accepts review content from users and renders it back to the page without adequate sanitization or output encoding. Because the input is stored server-side and served to every subsequent visitor, this is a stored XSS variant rather than a reflected one. Stored XSS carries greater operational risk because it does not require social engineering to deliver the payload to victims.

The scope change indicated in the CVSS vector reflects that injected script executes in the security context of the WordPress site rather than the attacker's origin. User interaction is required, meaning a victim must load a page that renders the malicious review. Once loaded, the payload runs with the privileges of the viewing user, including any authenticated administrator session.

Root Cause

The root cause is missing or insufficient neutralization of HTML control characters in review submission fields before storage and rendering. The plugin fails to apply WordPress escaping functions such as esc_html(), esc_attr(), or wp_kses() on user-controlled fields prior to output. This allows raw <script> tags and event handler attributes to survive into the rendered DOM.

Attack Vector

An unauthenticated attacker submits a crafted review containing JavaScript through a public-facing review submission form exposed by the plugin. The malicious content is stored in the WordPress database. When any user, including a logged-in administrator, visits a page that displays the review, the browser parses and executes the injected script. Typical post-exploitation actions include stealing authentication cookies, hijacking the WordPress admin session, injecting backdoor administrator accounts, or redirecting visitors to malware distribution sites.

The vulnerability requires no privileges to exploit. Technical details are documented in the Patchstack Vulnerability Database Entry.

Detection Methods for CVE-2024-25597

Indicators of Compromise

• Review entries in the WordPress database containing <script> tags, javascript: URIs, or DOM event handlers such as onerror=, onload=, or onclick=
• Unexpected outbound requests from visitor browsers to attacker-controlled domains originating from pages that display reviews
• New WordPress administrator accounts created without a corresponding audit trail
• Modifications to wp_options, active theme files, or plugin files following review submissions

Detection Strategies

• Query the wp_posts or plugin-specific review tables for HTML tags and JavaScript URI schemes within review content fields
• Inspect web server access logs for POST requests to the Ultimate Reviews submission endpoint containing URL-encoded script payloads
• Deploy a Web Application Firewall (WAF) rule set that flags XSS payload signatures targeting WordPress review endpoints
• Enable and review WordPress audit logging plugins to correlate review submissions with subsequent privileged actions

Monitoring Recommendations

• Monitor Content Security Policy (CSP) violation reports for inline script executions on pages that render reviews
• Alert on anomalous administrator session activity following visits to review pages, such as new user creation or plugin installations
• Track file integrity for wp-content/plugins/ and theme directories to detect backdoors dropped via a hijacked admin session

How to Mitigate CVE-2024-25597

Immediate Actions Required

• Update Ultimate Reviews to a version later than 3.2.8 as soon as a patched release is available from the vendor
• Deactivate and remove the Ultimate Reviews plugin if a patched version is not yet installable in your environment
• Audit all stored reviews for embedded JavaScript and purge malicious entries from the database
• Rotate WordPress administrator credentials and invalidate active sessions if exploitation is suspected

Patch Information

The vulnerability affects Ultimate Reviews versions up to and including 3.2.8. Administrators should consult the Patchstack Vulnerability Database Entry and the vendor's plugin page on the WordPress Plugin Directory for the latest fixed release.

Workarounds

• Restrict review submissions to authenticated users via WordPress role and capability configuration until the plugin is patched
• Deploy a WAF rule that blocks HTML tags and JavaScript event handlers in POST parameters targeting the plugin's submission endpoint
• Enforce a strict Content Security Policy that disallows inline scripts and limits script sources to trusted origins
• Disable public display of reviews temporarily by unpublishing pages or shortcodes that render user-submitted review content

# Example restrictive Content Security Policy header for Apache
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"