CVE-2024-8942 Overview
CVE-2024-8942 is a reflected Cross-Site Scripting (XSS) vulnerability affecting Scriptcase version 9.4.019, a low-code PHP web application generator. The flaw stems from missing input validation on the id_form_msg_title parameter and other request parameters processed by the application. An unauthenticated remote attacker can craft a malicious URL that executes arbitrary JavaScript in the victim's browser session. Successful exploitation can lead to session credential theft and account compromise. The vulnerability is tracked under CWE-79 and was disclosed through the Spanish INCIBE CERT Security Notice.
Critical Impact
Attackers can hijack authenticated Scriptcase sessions and exfiltrate user credentials by tricking victims into clicking a crafted URL.
Affected Products
- Scriptcase 9.4.019
- Deployments using the id_form_msg_title parameter and related vulnerable inputs
- Web applications generated and exposed through the affected Scriptcase build
Discovery Timeline
- 2024-09-25 - CVE-2024-8942 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-8942
Vulnerability Analysis
The vulnerability is a reflected XSS issue [CWE-79] in the Scriptcase web interface. The id_form_msg_title parameter, along with other request parameters, is rendered back into the HTTP response without proper output encoding or input sanitization. An attacker who controls the value of these parameters can inject arbitrary HTML and JavaScript that executes in the context of the victim's browser. Because the attack changes the security scope of the rendered page, the impact extends beyond the originally vulnerable component to any resource accessible within the user's authenticated Scriptcase session.
Root Cause
The root cause is the absence of input validation and contextual output encoding when reflecting user-supplied values into HTML responses. Scriptcase accepts attacker-controlled query string data and emits it into the DOM verbatim, allowing script payloads to break out of the intended HTML context.
Attack Vector
Exploitation requires user interaction. The attacker delivers a specially crafted URL containing a JavaScript payload in the id_form_msg_title parameter through phishing, chat, or another social engineering channel. When an authenticated Scriptcase user opens the link, the injected script runs with the privileges of that session and can read cookies, session tokens, or form fields and transmit them to an attacker-controlled endpoint.
No verified public proof-of-concept code is referenced in the advisory. The INCIBE CERT Security Notice describes the affected parameter and impact.
Detection Methods for CVE-2024-8942
Indicators of Compromise
- Web server access logs containing id_form_msg_title values with HTML tags, <script>, javascript:, onerror=, or URL-encoded equivalents such as %3Cscript%3E.
- Outbound requests from user browsers to unfamiliar domains immediately after loading a Scriptcase URL.
- Unexpected session cookie reuse from new IP addresses or user agents following a click on an external link.
Detection Strategies
- Inspect HTTP request parameters reaching Scriptcase endpoints for script tags, event handlers, and encoded payload variants.
- Correlate referrer headers pointing to external chat, email, or social platforms with parameter anomalies on Scriptcase URLs.
- Apply WAF signatures aligned to OWASP Reflected XSS patterns at the Scriptcase ingress.
Monitoring Recommendations
- Forward Scriptcase web server and reverse proxy logs to a centralized log platform and alert on XSS-indicative parameter values.
- Monitor administrative and developer accounts for session anomalies, including geographic and device changes shortly after URL clicks.
- Track Content Security Policy (CSP) violation reports if CSP is deployed in front of Scriptcase.
How to Mitigate CVE-2024-8942
Immediate Actions Required
- Upgrade Scriptcase to a release later than 9.4.019 that addresses the input validation defect referenced in the INCIBE CERT advisory.
- Restrict access to the Scriptcase administrative interface to trusted networks or VPN users until patching is complete.
- Notify Scriptcase users to avoid clicking unsolicited links that reference the application's URL or parameters.
Patch Information
The vendor advisory and remediation tracking are coordinated through INCIBE CERT. Administrators should consult Scriptcase release notes for fixed builds beyond version 9.4.019 and apply them across all instances.
Workarounds
- Deploy a Web Application Firewall (WAF) rule that strips or blocks HTML and script syntax in the id_form_msg_title parameter and other reflected inputs.
- Enforce a strict Content Security Policy that disallows inline scripts and unknown script sources for Scriptcase pages.
- Set the HttpOnly and Secure attributes on Scriptcase session cookies to limit credential theft impact from XSS payloads.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
