CVE-2024-54032: Adobe Connect Stored XSS Vulnerability

CVE-2024-54032 Overview

Adobe Connect versions 12.6, 11.4.7 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim's browser when they browse to the page containing the vulnerable field. A successful attacker can abuse this to achieve session takeover, increasing the confidentiality and integrity impact as high.

Critical Impact

This stored XSS vulnerability enables attackers to execute arbitrary JavaScript in victims' browsers, potentially leading to session hijacking, credential theft, and unauthorized actions performed on behalf of authenticated users within Adobe Connect environments.

Affected Products

• Adobe Connect versions 12.6 and earlier
• Adobe Connect versions 11.4.7 and earlier

Discovery Timeline

• 2024-12-10 - CVE-2024-54032 published to NVD
• 2025-01-15 - Last updated in NVD database

Technical Details for CVE-2024-54032

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 stored nature of this XSS vulnerability makes it particularly dangerous, as the malicious payload persists within the application and executes whenever any user accesses the affected page.

The vulnerability exists within form fields in Adobe Connect that fail to properly sanitize user-supplied input before storing and rendering it. When a victim navigates to a page containing the attacker's injected script, the malicious JavaScript executes within the context of the victim's authenticated session.

The attack can be executed remotely over the network and requires user interaction—specifically, the victim must browse to the page containing the injected payload. Due to the scope change characteristic of this vulnerability, the impact extends beyond the vulnerable component itself, affecting the victim's browser session and potentially other connected systems.

Root Cause

The root cause of CVE-2024-54032 is inadequate input validation and output encoding in Adobe Connect's form field processing functionality. User-supplied data is stored without proper sanitization and subsequently rendered to other users' browsers without appropriate encoding, allowing script injection attacks.

The application fails to implement proper security controls such as:

• Input validation to reject or sanitize potentially malicious script content
• Context-aware output encoding when rendering stored content
• Content Security Policy (CSP) headers that could mitigate script execution

Attack Vector

The attack vector for this vulnerability is network-based and follows a typical stored XSS attack pattern:

1. An attacker identifies a vulnerable form field within Adobe Connect that stores user input
2. The attacker crafts a malicious payload containing JavaScript code designed to steal session tokens, cookies, or perform actions on behalf of the victim
3. The attacker submits the payload through the vulnerable form field, causing it to be stored in the application's database
4. When a victim (such as an administrator or meeting host) views the page containing the stored payload, the malicious script executes in their browser
5. The script can then exfiltrate session credentials, perform unauthorized actions, or redirect the user to attacker-controlled resources

The exploitation requires no privileges for the attacker to inject the payload, though user interaction from a victim is required for the attack to succeed.

Detection Methods for CVE-2024-54032

Indicators of Compromise

• Unusual JavaScript patterns or encoded script tags appearing in form field data within Adobe Connect databases
• Session tokens being transmitted to external or unauthorized domains
• Unexpected network connections originating from user browsers while accessing Adobe Connect pages
• User reports of unexpected behavior, redirects, or suspicious pop-ups when using Adobe Connect

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block common XSS payloads in requests to Adobe Connect
• Enable and monitor browser Content Security Policy (CSP) violation reports for script execution attempts
• Review Adobe Connect application logs for form submissions containing suspicious characters or script patterns
• Deploy browser-based security monitoring to detect unauthorized script execution or data exfiltration attempts

Monitoring Recommendations

• Configure SIEM alerts for anomalous patterns in Adobe Connect web traffic and user session activity
• Monitor for unusual cookie or token transmission to external domains from users accessing Adobe Connect
• Implement real-time alerting on WAF XSS detection rules specific to Adobe Connect endpoints
• Track and investigate any CSP violation reports originating from Adobe Connect application pages

How to Mitigate CVE-2024-54032

Immediate Actions Required

• Upgrade Adobe Connect to version 12.7 or later (or 11.4.8 or later for the 11.x branch) immediately
• Review existing form field data for potential malicious payloads that may have been injected prior to patching
• Implement Content Security Policy headers to restrict inline script execution as a defense-in-depth measure
• Educate users to report any suspicious behavior encountered while using Adobe Connect

Patch Information

Adobe has released security updates to address this vulnerability as documented in Adobe Security Advisory APSB24-99. Organizations should apply the latest available patches for their Adobe Connect deployment:

• For Adobe Connect 12.x: Upgrade to version 12.7 or later
• For Adobe Connect 11.x: Upgrade to version 11.4.8 or later

Review the official Adobe security bulletin for complete patching instructions and verify the integrity of downloaded updates before deployment.

Workarounds

• Deploy a Web Application Firewall (WAF) with XSS detection rules in front of Adobe Connect to filter malicious input
• Implement strict Content Security Policy (CSP) headers to prevent inline script execution
• Restrict access to Adobe Connect to trusted networks or VPN-connected users until patches can be applied
• Disable or restrict functionality related to vulnerable form fields if operationally feasible as a temporary measure

# Example CSP header configuration for defense-in-depth
# Add to web server configuration (Apache/Nginx)
# Note: Test thoroughly before production deployment

# Apache configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'self';"

# Nginx configuration
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'self';";