CVE-2025-22769: Creative Brahma Multifox Stored XSS

CVE-2025-22769 Overview

CVE-2025-22769 is a stored cross-site scripting (XSS) vulnerability in the Creative Brahma Multifox WordPress theme. The flaw affects all versions of Multifox up to and including 1.3.7. It stems from improper neutralization of user input during web page generation, classified as [CWE-79]. An authenticated attacker with low privileges can inject malicious scripts that persist in the application and execute in the browsers of other users who view the affected pages.

Critical Impact

Authenticated attackers can inject persistent JavaScript that executes in victim browsers, enabling session hijacking, credential theft, and unauthorized actions within the scope of the WordPress site.

Affected Products

• Creative Brahma Multifox WordPress Theme (all versions through 1.3.7)

Discovery Timeline

• 2025-01-15 - CVE-2025-22769 published to the National Vulnerability Database
• 2026-06-17 - Last updated in the NVD database

Technical Details for CVE-2025-22769

Vulnerability Analysis

The Multifox WordPress theme fails to properly sanitize or encode user-supplied input before rendering it in web pages. Because the injected payload is stored server-side, every subsequent visitor to the affected page triggers script execution in their browser context.

Stored XSS is more impactful than reflected XSS because the payload persists without requiring social engineering for each victim. The attack scope is marked as changed, meaning the injected code can affect resources beyond the vulnerable component, including administrator sessions.

Exploitation requires low privileges and user interaction, typically another user visiting the page containing the stored payload. Successful exploitation can result in session token theft, arbitrary actions performed as the victim, and defacement of theme-controlled page regions.

Root Cause

The root cause is missing or insufficient output encoding in theme templates that render user-controlled data. Input accepted through theme fields, comments, or customization options is written to the HTML response without escaping characters such as <, >, ", and '. WordPress provides sanitization helpers like esc_html(), esc_attr(), and wp_kses(), but the vulnerable code paths in Multifox omit these functions.

Attack Vector

An authenticated user with contributor-level or higher privileges submits crafted content containing JavaScript payloads through a theme-controlled input field. The payload is stored in the WordPress database and rendered verbatim when the page is later requested. When an administrator or other privileged user views the affected page, the script executes with the victim's session context.

The vulnerability manifests in theme rendering functions that emit stored input without escaping. Refer to the Patchstack Vulnerability Report for technical details.

Detection Methods for CVE-2025-22769

Indicators of Compromise

• Unexpected <script> tags, javascript: URIs, or event handler attributes (onerror, onload, onclick) stored in WordPress post, page, or theme option tables
• Outbound HTTP requests from visitor browsers to unfamiliar domains after loading pages rendered by the Multifox theme
• Anomalous administrator sessions or newly created privileged accounts following visits to theme-rendered pages

Detection Strategies

• Query the wp_posts, wp_postmeta, and wp_options tables for content containing script tags, encoded payloads, or suspicious HTML attributes
• Deploy a web application firewall rule to flag POST requests containing common XSS payload patterns directed at Multifox endpoints
• Enable a strict Content Security Policy in report-only mode to surface unexpected inline script execution on theme-rendered pages

Monitoring Recommendations

• Monitor WordPress audit logs for content modifications by contributor or author accounts on pages rendered by Multifox
• Alert on privilege escalations, unexpected role changes, and creation of new administrator users
• Review browser telemetry and endpoint logs for anomalous script execution originating from the affected WordPress domain

How to Mitigate CVE-2025-22769

Immediate Actions Required

• Identify all WordPress installations running the Multifox theme at version 1.3.7 or earlier
• Restrict content submission privileges to trusted users until a patched version is applied
• Audit stored content for injected payloads and remove any malicious entries from the database

Patch Information

At the time of publication, the vulnerability affects Multifox versions through 1.3.7. Administrators should consult the Patchstack Vulnerability Report and the theme vendor for updated release information and apply any fixed version as soon as it becomes available.

Workarounds

• Deactivate the Multifox theme and switch to an unaffected theme until a fixed release is installed
• Implement a virtual patch through a web application firewall to block XSS payload patterns targeting Multifox routes
• Enforce a strict Content Security Policy that disallows inline scripts and untrusted script sources
• Limit user roles capable of submitting content to trusted administrators only

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