CVE-2025-48258 Overview
CVE-2025-48258 is a stored cross-site scripting (XSS) vulnerability in the jetmonsters Mega Menu Block (getwid-megamenu) plugin for WordPress. The plugin fails to properly neutralize user input during web page generation, allowing authenticated attackers to inject persistent malicious scripts. The issue affects all versions up to and including 1.0.6. Injected payloads execute in the browsers of visitors and administrators who view the affected pages, enabling session theft, forced administrative actions, and further compromise of the WordPress site.
Critical Impact
Authenticated attackers with contributor-level access or higher can inject persistent JavaScript that executes in the context of any user visiting affected pages, including administrators.
Affected Products
- jetmonsters Mega Menu Block (getwid-megamenu) WordPress plugin
- All versions from initial release through 1.0.6
- WordPress sites with the plugin installed and activated
Discovery Timeline
- 2025-05-19 - CVE-2025-48258 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-48258
Vulnerability Analysis
The vulnerability is classified as [CWE-79], Improper Neutralization of Input During Web Page Generation. The Mega Menu Block plugin accepts block attributes or menu content from authenticated users without sufficient output encoding or input sanitization. When the affected menu block is rendered on the front end or in the WordPress admin, the untrusted input is emitted directly into the HTML context, causing the browser to parse and execute attacker-controlled JavaScript.
Because the payload is stored in the database as part of block content, exploitation is persistent. Any visitor loading a page that contains the tainted menu block triggers the script without further attacker interaction. Exploitation requires low privileges and user interaction, and the scope is changed because injected script executes in the security context of other users.
Root Cause
The plugin does not apply appropriate sanitization functions such as wp_kses_post() or esc_attr() to menu block attributes before rendering them. Content submitted through the block editor is trusted and reflected into the DOM, allowing HTML and JavaScript to be persisted and later served to every viewer of the affected page.
Attack Vector
An attacker with contributor, author, or editor privileges creates or edits content using the Mega Menu Block and embeds a malicious payload in a vulnerable attribute. The payload is stored in the WordPress database. When a higher-privileged user (such as an administrator) or a site visitor loads the page, the script executes with their session cookies and DOM access. Consult the Patchstack XSS Vulnerability Report for advisory details.
// No verified public exploit code is available.
// See the Patchstack advisory for technical details.
Detection Methods for CVE-2025-48258
Indicators of Compromise
- Menu block post content containing <script>, onerror=, onload=, or javascript: handlers stored in wp_posts
- Unexpected outbound requests from browsers of admin users to attacker-controlled domains after loading pages containing the Mega Menu Block
- New or modified WordPress user accounts with administrator role created shortly after admins viewed affected pages
- Unfamiliar plugin or theme installations coinciding with sessions of admins visiting pages with the plugin active
Detection Strategies
- Scan the WordPress database for menu block markup that contains inline event handlers or <script> tags in post_content
- Deploy a Content Security Policy (CSP) in report-only mode and monitor for inline script violations on pages using the plugin
- Review Web Application Firewall (WAF) logs for requests posting suspicious HTML to /wp-json/wp/v2/blocks or admin-ajax.php endpoints
Monitoring Recommendations
- Track edits made by contributor and author accounts to posts and reusable blocks that include the Mega Menu Block
- Alert on new administrator role assignments and unexpected changes to wp_options such as siteurl or home
- Monitor browser telemetry from privileged users for unusual DOM activity or exfiltration attempts on pages using the plugin
How to Mitigate CVE-2025-48258
Immediate Actions Required
- Update the getwid-megamenu plugin to a version later than 1.0.6 once the vendor releases a patched release
- Audit all posts, pages, and reusable blocks using the Mega Menu Block for injected script content and remove tainted entries
- Rotate credentials and invalidate active sessions for any administrator who accessed pages containing the affected block
- Restrict content editing permissions and review recent role changes for unauthorized escalations
Patch Information
At the time of publication, the vendor advisory tracked by Patchstack lists all versions through 1.0.6 as vulnerable. Site operators should monitor the Patchstack XSS Vulnerability Report and the plugin's WordPress.org page for a fixed release, and apply it as soon as it becomes available.
Workarounds
- Deactivate and remove the getwid-megamenu plugin until a patched version is available
- Enforce a strict Content Security Policy that blocks inline scripts and unknown origins to reduce XSS impact
- Limit contributor, author, and editor role assignments to trusted users and enable two-factor authentication for editors and administrators
- Deploy a WAF rule that filters HTML event handlers and <script> tags in block editor REST API requests
# Temporarily disable the vulnerable plugin via WP-CLI
wp plugin deactivate getwid-megamenu
wp plugin delete getwid-megamenu
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
