CVE-2024-43950 Overview
CVE-2024-43950 is a stored Cross-Site Scripting (XSS) vulnerability affecting the Nextbricks Brickscore plugin for WordPress. The flaw stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. Attackers can inject malicious JavaScript that persists in the application and executes in the browsers of users who view the affected content. All versions of Brickscore from initial release through 1.4.2.5 are impacted.
Critical Impact
Stored XSS enables session hijacking, credential theft, and unauthorized actions performed in the context of authenticated WordPress users, including administrators.
Affected Products
- Nextbricks Brickscore WordPress plugin, versions up to and including 1.4.2.5
- WordPress sites with Brickscore installed and activated
- Site administrators and authenticated visitors who render affected content
Discovery Timeline
- 2024-08-29 - CVE-2024-43950 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-43950
Vulnerability Analysis
The Brickscore plugin fails to sanitize or encode user-supplied input before rendering it in WordPress pages. This allows an attacker with the ability to submit input handled by the plugin to store JavaScript payloads in the database. The payload executes each time a visitor loads a page containing the tainted content. Because the vulnerability requires user interaction and affects components rendered in the browser, the scope changes across security boundaries, exposing both authenticated administrators and unauthenticated visitors.
Exploitation does not require authentication in most Patchstack-catalogued cases of this class, though it does require a victim to load the injected content. Successful attacks can lead to WordPress session cookie theft, arbitrary administrative actions via forged requests, redirection to malicious infrastructure, and delivery of secondary payloads such as cryptominers or credential harvesters.
Root Cause
The root cause is missing output encoding and input validation in the Brickscore plugin code paths that render user-controlled data. Standard WordPress escaping functions such as esc_html(), esc_attr(), and wp_kses() are either absent or misapplied, allowing raw HTML and script tags to reach the rendered DOM.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker submits a crafted input containing JavaScript through a Brickscore-controlled field. The payload is stored server-side and executes when a WordPress user or administrator subsequently views the page containing the injected data. Refer to the Patchstack Vulnerability Report for advisory details.
No verified public proof-of-concept code is available; the vulnerability is described in prose based on the Patchstack advisory.
Detection Methods for CVE-2024-43950
Indicators of Compromise
- Unexpected <script>, <iframe>, or event-handler attributes such as onerror= and onload= stored in WordPress database tables associated with Brickscore
- Outbound browser requests from WordPress sessions to unfamiliar domains after loading Brickscore-rendered pages
- New or modified WordPress administrator accounts appearing without corresponding admin activity in access logs
- Unexpected changes to WordPress plugin, theme, or user configuration coinciding with visits to pages containing Brickscore output
Detection Strategies
- Inspect wp_posts, wp_postmeta, and Brickscore-specific tables for HTML tags and JavaScript event handlers within user-submitted fields
- Deploy a Web Application Firewall (WAF) rule set that flags XSS payload patterns targeting WordPress plugin endpoints
- Correlate WordPress access logs with authenticated admin session activity to identify anomalous POST or AJAX requests originating from browsers rendering Brickscore content
Monitoring Recommendations
- Enable and centralize WordPress audit logging with a plugin that records content changes, user creation, and configuration modifications
- Monitor Content Security Policy (CSP) violation reports for inline script executions on pages that render Brickscore output
- Track plugin file integrity to detect unauthorized modifications following suspected exploitation
How to Mitigate CVE-2024-43950
Immediate Actions Required
- Update the Brickscore plugin to a version later than 1.4.2.5 as soon as the vendor publishes a fixed release
- Audit all Brickscore-managed content and metadata for injected scripts and remove any tainted entries
- Rotate WordPress administrator credentials and invalidate active sessions if exploitation is suspected
- Review recently created users and scheduled tasks (wp_cron) for unauthorized entries
Patch Information
The Patchstack advisory identifies the affected range as versions up to and including 1.4.2.5. Site operators should consult the Patchstack Vulnerability Report and the Nextbricks vendor channel for the fixed release. If no fixed version is available, deactivate and remove the plugin until a patch is published.
Workarounds
- Deactivate the Brickscore plugin until a patched version is confirmed available
- Deploy a WAF with virtual patching rules that block XSS payloads targeting Brickscore endpoints
- Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
- Restrict Brickscore-related input capabilities to trusted authenticated roles only
# Example CSP header to limit inline script execution
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; report-uri /csp-report"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
