Cybersecurity researchers have known as consideration to a brand new marketing campaign that is actively exploiting a just lately disclosed essential 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 at this time.
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) functions.
Profitable exploitation of the flaw might 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 lively 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 most recent findings from Pattern Micro present that risk actors are focusing 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 so as 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. “Primarily based on these steps, the attacker is probably going profiling all susceptible 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 completely different downloader scripts on the identical host used to fetch Flodrix, suggesting that the marketing campaign is present process lively growth.
Flodrix is assessed to be an evolution of one other botnet known as LeetHozer that is linked to the Moobot group. The improved variant incorporates the power to discreetly take away itself, decrease forensic traces, and complicate evaluation efforts by obfuscating command-and-control (C2) server addresses and different essential indicators.
“One other important change is the introduction of latest DDoS assault sorts, which are actually additionally encrypted, including an extra 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.”
