CVE-2025-43560: Adobe ColdFusion RCE Vulnerability

CVE-2025-43560 Overview

CVE-2025-43560 is a critical Improper Input Validation vulnerability affecting Adobe ColdFusion application server platforms. This vulnerability allows a high-privileged attacker to bypass security mechanisms and achieve arbitrary code execution in the context of the current user. The flaw can be exploited remotely over the network without requiring any user interaction, and notably, the scope of the attack is changed, meaning the vulnerability can impact resources beyond the vulnerable component itself.

Adobe ColdFusion has historically been a high-value target for attackers due to its common deployment in enterprise environments for web application development. This vulnerability represents a significant security risk for organizations running affected versions of the platform.

Critical Impact
This vulnerability enables remote arbitrary code execution with scope change, allowing attackers with high privileges to compromise not only the ColdFusion server but potentially other resources within the environment.

Affected Products

Adobe ColdFusion 2025 (update 1 and earlier)
Adobe ColdFusion 2023 (update 13 and earlier)
Adobe ColdFusion 2021 (update 19 and earlier)

Discovery Timeline

May 13, 2025 - CVE-2025-43560 published to NVD
May 19, 2025 - Last updated in NVD database

Technical Details for CVE-2025-43560

Vulnerability Analysis

This vulnerability stems from improper input validation within Adobe ColdFusion's processing logic. When user-supplied input is not properly validated before being processed by the application, attackers can craft malicious requests that bypass intended security controls. The vulnerability is classified under CWE-20 (Improper Input Validation), which indicates that the application fails to properly validate or sanitize input data before using it in operations.

The attack can be initiated remotely over the network, requires no user interaction, and can be exploited with low attack complexity. While the attacker must possess high-level privileges to exploit this flaw, successful exploitation results in a scope change—meaning the attacker can affect resources beyond the initially vulnerable component. This characteristic significantly amplifies the potential damage, as compromised ColdFusion servers often have access to backend databases, internal networks, and sensitive business data.

Root Cause

The root cause of CVE-2025-43560 is an Improper Input Validation flaw within Adobe ColdFusion. The application fails to adequately validate input data before processing, allowing specially crafted malicious input to bypass security mechanisms. This type of vulnerability typically occurs when:

Input boundaries are not properly enforced
Data type validation is insufficient
Special characters or escape sequences are not properly sanitized
Trust boundaries between components are not properly enforced

This lack of proper validation allows attackers to inject malicious payloads that are subsequently processed and executed by the ColdFusion runtime, leading to arbitrary code execution.

Attack Vector

The attack vector for CVE-2025-43560 is network-based, meaning an attacker can exploit this vulnerability remotely without physical access to the target system. The exploitation scenario involves:

An attacker with high-level privileges on the ColdFusion server identifies vulnerable endpoints or functionality
The attacker crafts malicious input designed to bypass input validation controls
The malicious payload is submitted to the vulnerable ColdFusion instance via network requests
Due to improper validation, the payload bypasses security mechanisms
The ColdFusion server processes the malicious input, resulting in arbitrary code execution
Due to the scope change characteristic, the attacker may be able to pivot to other systems or resources

The vulnerability mechanism involves input validation bypass leading to code execution. Technical details are available in the Adobe ColdFusion Security Advisory APSB25-52.

Detection Methods for CVE-2025-43560

Indicators of Compromise

Unusual process spawning from ColdFusion runtime processes (coldfusion.exe, cfusion.jar)
Unexpected outbound network connections from ColdFusion servers
Anomalous file system activity in ColdFusion installation directories
Authentication events showing high-privileged account access followed by suspicious actions

Detection Strategies

Monitor ColdFusion application logs for unusual request patterns or error messages indicating input validation failures
Implement web application firewall (WAF) rules to detect and block malicious payloads targeting ColdFusion endpoints
Deploy endpoint detection solutions to monitor for suspicious process execution chains originating from ColdFusion services
Review authentication logs for high-privileged account activity on ColdFusion administrative interfaces

Monitoring Recommendations

Enable verbose logging on ColdFusion servers to capture detailed request and response data
Implement network traffic analysis to detect unusual patterns in ColdFusion-related communications
Configure alerting for privilege escalation attempts or unauthorized administrative access
Establish baseline behavior for ColdFusion processes and alert on deviations

How to Mitigate CVE-2025-43560

Immediate Actions Required

Apply Adobe security patches immediately for all affected ColdFusion installations
Restrict network access to ColdFusion servers, limiting exposure to trusted networks only
Review and audit high-privileged accounts with access to ColdFusion administration
Implement additional monitoring on ColdFusion servers pending patch application

Patch Information

Adobe has released security updates to address this vulnerability as documented in security bulletin APSB25-52. Organizations should upgrade to the following versions:

ColdFusion 2025: Update to version later than Update 1
ColdFusion 2023: Update to version later than Update 13
ColdFusion 2021: Update to version later than Update 19

Patches can be obtained through Adobe's official download channels. It is strongly recommended to test patches in a non-production environment before deploying to production servers.

Workarounds

Restrict administrative access to ColdFusion servers to trusted IP addresses using firewall rules
Implement network segmentation to isolate ColdFusion servers from critical internal resources
Disable or remove unnecessary ColdFusion features and administrative endpoints until patches can be applied
Deploy web application firewall rules to filter potentially malicious input targeting ColdFusion

bash

# Example: Restrict ColdFusion admin access to trusted networks using iptables
iptables -A INPUT -p tcp --dport 8500 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8500 -j DROP

# Example: Block external access to ColdFusion administrator
iptables -A INPUT -p tcp --dport 443 -m string --string "/CFIDE/administrator" --algo bm -j DROP