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CVE-2023-27856 is a path traversal vulnerability in affected versions of Rockwell Automation ThinManager ThinServer. The issue occurs when ThinServer processes a message of type 8, allowing insufficient restriction of file path resolution. A remote, unauthenticated attacker can exploit this condition to traverse directories and access arbitrary files located on the disk drive where ThinServer.exe is installed. Based on the provided information, the vulnerability enables file download rather than file modification or code execution.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit auxiliary module targeting CVE-2023-27856, a path traversal vulnerability in Rockwell Automation ThinManager (versions up to and including 13.0.1). The module allows an attacker to download arbitrary files from the target system by sending a specially crafted request to the ThinManager service, which listens by default on TCP port 2031. The exploit works by prepending a user-specified file path with a configurable number of '../' traversal sequences, enabling access to files outside the intended directory. The module is operational and provides the ability to retrieve files as loot within Metasploit. The code is written in Ruby and is structured as a standard Metasploit auxiliary module, with options for specifying the target file and traversal depth. No hardcoded IP addresses or domains are present; the attacker must specify the target host. The exploit is not a detection script but a functional file download exploit.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.