CVE-2025-49322 Overview
CVE-2025-49322 is a stored Cross-Site Scripting (XSS) vulnerability in the SeedProd 404 Page plugin for WordPress. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. An authenticated attacker with high privileges can inject malicious JavaScript that persists in the plugin's stored content. When a victim renders the affected page, the payload executes in the victim's browser context. The vulnerability crosses a security scope boundary, meaning injected scripts can affect components beyond the vulnerable component itself.
Critical Impact
Stored XSS allows persistent JavaScript execution in visitor browsers, enabling session hijacking, credential theft, and administrative account takeover on affected WordPress sites.
Affected Products
- SeedProd 404 Page plugin for WordPress
- Versions up to and including 1.0.2 (per the Patchstack advisory)
- WordPress sites running the SeedProd 404 Page component
Discovery Timeline
- 2025-06-06 - CVE-2025-49322 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-49322
Vulnerability Analysis
The vulnerability is a stored XSS flaw classified under [CWE-79]. The SeedProd 404 Page plugin fails to properly sanitize and encode input supplied by authenticated users before storing it and rendering it on the resulting 404 page. Because the payload persists in the WordPress database, every subsequent visitor loads and executes it.
Exploitation requires an authenticated user with elevated privileges and depends on victim interaction with the crafted 404 page. The scope change indicates that injected scripts can act against resources outside the plugin's own security context, including the WordPress administrative interface.
Root Cause
The root cause is missing or insufficient output encoding when the plugin renders stored 404 page content. Input accepted through the plugin's configuration interface is written to persistent storage without escaping HTML-significant characters. When WordPress later emits this content into the response body, the browser parses attacker-controlled markup as executable script.
Attack Vector
The attack is network-based and requires low complexity. A privileged authenticated user submits crafted content containing script payloads through the plugin's configuration surface. The payload is stored server-side. When a targeted user, including a site administrator, subsequently views the rendered page, the browser executes the injected JavaScript under the site's origin. See the Patchstack WordPress Vulnerability Advisory for advisory details.
No verified public exploit code is available. The vulnerability is described in prose based on the vendor advisory.
Detection Methods for CVE-2025-49322
Indicators of Compromise
- Unexpected <script> tags, on* event handlers, or javascript: URIs stored in SeedProd 404 Page plugin options within the WordPress wp_options table
- Outbound requests from visitor browsers to unfamiliar domains when loading the site's 404 page
- New or modified WordPress administrator accounts created shortly after a privileged user viewed the 404 page
Detection Strategies
- Audit plugin-managed database rows for HTML or JavaScript content that should be plain text
- Review web server access logs for repeated requests to non-existent URLs designed to trigger the 404 handler
- Correlate WordPress user activity logs with changes to SeedProd plugin settings by high-privilege accounts
Monitoring Recommendations
- Enable a WordPress activity logging plugin to record configuration changes made by editor and administrator accounts
- Deploy a Content Security Policy (CSP) with reporting to surface unexpected inline script execution
- Monitor for anomalous session activity from administrator accounts following visits to public error pages
How to Mitigate CVE-2025-49322
Immediate Actions Required
- Update the SeedProd 404 Page plugin to the latest available version distributed by the vendor
- Review all administrator, editor, and author accounts and revoke unused privileged access
- Inspect the plugin's stored settings for injected markup and remove any suspicious content
- Rotate credentials for privileged WordPress users if compromise is suspected
Patch Information
Refer to the Patchstack WordPress Vulnerability Advisory for the current patched release. The advisory identifies affected versions up to 1.0.2. Apply vendor updates through the WordPress plugin management interface as soon as they are validated in a staging environment.
Workarounds
- Deactivate and remove the SeedProd 404 Page plugin until a patched version is installed
- Restrict plugin configuration permissions to a minimum set of trusted administrators
- Enforce a strict Content Security Policy that blocks inline scripts and untrusted script sources
- Deploy a web application firewall rule set that filters XSS payloads submitted to WordPress admin endpoints
# Example CSP header enforced at the web server to limit inline script execution
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
