CVE-2024-11626: Progress Sitefinity XSS Vulnerability

CVE-2024-11626 Overview

CVE-2024-11626 is a Cross-Site Scripting (XSS) vulnerability affecting the administrative backend of Progress Sitefinity CMS. The vulnerability stems from improper neutralization of user input during web page generation in the CMS backend administrative section, allowing authenticated attackers with high privileges to inject malicious scripts that execute in the context of other users' browsers.

Critical Impact

Authenticated attackers with administrative access can inject malicious scripts into the Sitefinity CMS backend, potentially compromising other administrative users and enabling session hijacking, credential theft, or further privilege escalation within the content management system.

Affected Products

• Progress Sitefinity versions 4.0 through 14.4.8142
• Progress Sitefinity versions 15.0.8200 through 15.0.8229
• Progress Sitefinity versions 15.1.8300 through 15.1.8327
• Progress Sitefinity versions 15.2.8400 through 15.2.8421

Discovery Timeline

• January 7, 2025 - CVE-2024-11626 published to NVD
• July 29, 2025 - Last updated in NVD database

Technical Details for CVE-2024-11626

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting (XSS). The flaw exists within the administrative section of Progress Sitefinity CMS, where user-supplied input is not properly sanitized before being rendered in web pages.

The vulnerability requires an attacker to have high-privilege access (administrative credentials) and also requires user interaction for successful exploitation. When exploited, the attack can affect users beyond the vulnerable component's security scope, potentially impacting the confidentiality and integrity of data accessible through the CMS backend.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding in the Sitefinity CMS backend administrative interface. When processing user-supplied content in the administrative section, the application fails to properly neutralize special characters and HTML/JavaScript code before incorporating that input into dynamically generated web pages. This allows malicious script content to be stored or reflected back to other administrative users.

Attack Vector

The attack is conducted over the network and requires the attacker to have high-privilege (administrative) access to the Sitefinity CMS backend. The attack complexity is low, but successful exploitation requires user interaction—another user must view or interact with the page containing the injected malicious content.

A typical attack scenario involves an authenticated administrator injecting malicious JavaScript code through a vulnerable input field in the CMS backend. When another administrator accesses the affected page, the malicious script executes in their browser context, potentially allowing the attacker to:

• Steal session cookies and authentication tokens
• Perform actions on behalf of the victim administrator
• Modify CMS content or configuration
• Redirect users to phishing pages
• Extract sensitive information displayed in the admin interface

Detection Methods for CVE-2024-11626

Indicators of Compromise

• Unexpected JavaScript code or HTML tags appearing in CMS backend content fields or logs
• Unusual administrative activity originating from sessions accessed after viewing specific backend pages
• Browser console errors indicating blocked or executed inline scripts in the administrative interface
• Reports from administrators of unexpected behavior when accessing certain CMS pages

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block XSS payloads in requests to the Sitefinity administrative interface
• Implement Content Security Policy (CSP) headers to restrict inline script execution and report violations
• Enable detailed logging for administrative actions and monitor for suspicious modifications to CMS content
• Use endpoint detection tools to monitor for unusual browser behavior or script execution patterns

Monitoring Recommendations

• Monitor Sitefinity application logs for attempts to inject HTML or JavaScript through administrative input fields
• Review audit logs for administrative accounts showing unusual access patterns or content modifications
• Implement real-time alerting for CSP violation reports that may indicate XSS exploitation attempts
• Track browser-side security events from administrators accessing the CMS backend

How to Mitigate CVE-2024-11626

Immediate Actions Required

• Identify all Progress Sitefinity installations within your environment and determine current version numbers
• Review the Progress Security Advisory for specific patch information
• Prioritize patching Sitefinity instances accessible over the internet or with multiple administrative users
• Audit recent administrative activity in affected Sitefinity installations to identify potential exploitation

Patch Information

Progress has released security patches addressing this vulnerability. Organizations running affected versions should upgrade to the latest patched version of Sitefinity CMS as outlined in the Progress Security Advisory for CVE-2024-11625 and CVE-2024-11626. The advisory covers multiple version branches, so administrators should select the appropriate upgrade path based on their current installation.

Workarounds

• Restrict administrative access to the Sitefinity backend to only essential personnel and trusted networks until patching is complete
• Implement strict Content Security Policy headers to mitigate the impact of any XSS exploitation
• Deploy a Web Application Firewall (WAF) with XSS protection rules in front of Sitefinity installations
• Review and audit all content entered through the administrative interface for signs of script injection
• Consider temporarily disabling non-essential backend features that accept user input until the patch is applied