Cybersecurity researchers have referred to as consideration to a brand new marketing campaign that is actively exploiting a lately disclosed important safety flaw in Langflow to ship the Flodrix botnet malware.
“Attackers use the vulnerability to execute downloader scripts on compromised Langflow servers, which in flip fetch and set up the Flodrix malware,” Pattern Micro researchers Aliakbar Zahravi, Ahmed Mohamed Ibrahim, Sunil Bharti, and Shubham Singh stated in a technical report printed right now.
The exercise entails the exploitation of CVE-2025-3248 (CVSS rating: 9.8), a lacking authentication vulnerability in Langflow, a Python-based “visible framework” for constructing synthetic intelligence (AI) purposes.
Profitable exploitation of the flaw may allow unauthenticated attackers to execute arbitrary code through crafted HTTP requests. It was patched by Langflow in March 2025 with model 1.3.0.
Final month, the U.S. Cybersecurity and Infrastructure Safety Company (CISA) flagged the energetic exploitation of CVE-2025-3248 within the wild, with the SANS Expertise Institute revealing that it detected exploit makes an attempt towards its honeypot servers.
The newest findings from Pattern Micro present that risk actors are concentrating on unpatched internet-exposed Langflow cases leveraging a publicly-available proof-of-concept (PoC) code to conduct reconnaissance and drop a shell script downloader answerable for retrieving and executing the Flodrix botnet malware from “80.66.75[.]121:25565.”
As soon as put in, Flodrix units up communications with a distant server to obtain instructions over TCP with a view to launch distributed denial-of-service (DDoS) assaults towards goal IP addresses of curiosity. The botnet additionally helps connections over the TOR anonymity community.
“Since Langflow doesn’t implement enter validation or sandboxing, these payloads are compiled and executed throughout the server’s context, resulting in [remote code execution],” the researchers stated. “Based mostly on these steps, the attacker is probably going profiling all weak servers and makes use of the collected knowledge to establish high-value targets for future infections.”
Pattern Micro stated it recognized the unknown risk actors to be internet hosting totally different downloader scripts on the identical host used to fetch Flodrix, suggesting that the marketing campaign is present process energetic growth.
Flodrix is assessed to be an evolution of one other botnet referred to as LeetHozer that is linked to the Moobot group. The improved variant incorporates the flexibility to discreetly take away itself, decrease forensic traces, and complicate evaluation efforts by obfuscating command-and-control (C2) server addresses and different vital indicators.
“One other vital change is the introduction of recent DDoS assault sorts, which are actually additionally encrypted, including an additional layer of obfuscation,” Pattern Micro stated. “The brand new pattern additionally notably enumerates the operating processes by opening /proc listing to entry all operating processes.”
