Adobe ColdFusion Vulnerabilities Exploited During Christmas 2025 Holiday

Security researchers at GreyNoise detected thousands of malicious requests targeting at least a dozen vulnerabilities in Adobe ColdFusion servers over the Christmas 2025 holiday period, highlighting ongoing exploitation of legacy web application platforms in enterprise environments.

Overview of the Exploitation Wave

Adobe ColdFusion, a Java-based server for dynamic web content, faced a surge in attack attempts between December 24 and December 26, 2025. GreyNoise’s telemetry captured over 5,000 unique IP addresses scanning and attempting exploits against exposed ColdFusion instances worldwide. These attacks leveraged known vulnerabilities, many of which had patches available for years, indicating attackers prioritized low-hanging fruit during a time when security teams were likely understaffed due to holidays.

Technical Details of Targeted Vulnerabilities

The primary targets included CVE-2019-7839 through CVE-2020-7940, a cluster of authentication bypass and arbitrary file upload flaws in ColdFusion versions prior to 2018 Update 15 and 2016 Update 18. Attackers chained these with remote code execution (RCE) primitives, such as deserialization gadgets in ColdFusion’s CFML engine. For instance, a typical exploit payload involved sending a POST request to /cfide/administrator/enter.cfm with manipulated form data to bypass login, followed by uploading a malicious .cfm webshell. The webshell then executed system commands via runtime.exec() in the underlying Java Virtual Machine (JVM), allowing persistence through scheduled tasks or service modifications.

Attack Infrastructure and Tactics

Requests originated from bulletproof hosting providers in Russia, China, and Brazil, using proxy chains to evade detection. Tools like ColdFusion Exploit Kits, propagated via underground forums since 2023, automated the scanning process with Shodan-like queries for exposed servers on ports 80, 443, and 8500. Post-exploitation, attackers deployed Cobalt Strike beacons or custom Meterpreter payloads, exfiltrating database credentials from coldfusion-root.xml configuration files located in the server’s opt/cfusion/wwwroot directory.

Impact and Mitigation Recommendations

Compromised servers enabled cryptocurrency mining, data theft from connected databases, and lateral movement into corporate networks. Organizations using ColdFusion should immediately apply the latest patches, disable unnecessary administrator endpoints, implement Web Application Firewalls (WAFs) with ColdFusion-specific rules, and segment these legacy systems using network micro-segmentation. Transitioning to modern frameworks like Spring Boot or Node.js remains the long-term solution to reduce attack surface.