NO PLACE LIKE LOCALHOST: UNAUTHENTICATED REMOTE ACCESS VIA TRIOFOX VULNERABILITY CVE-2025-12480

Summary from the TLDR InfoSec newsletter

Mandiant has uncovered a significant security flaw in the Triofox file-sharing platform (tracked as CVE-2025-12480), which allows attackers to bypass authentication by manipulating the Host header to impersonate “localhost.” This gave unauthorized access to critical admin configuration pages, enabling the creation of privileged accounts. Attackers can exploit this to upload and execute arbitrary files, abusing Triofox's anti-virus feature to run malicious scripts with high privileges. The vulnerability is now patched, but organizations using Triofox should urgently update, check for rogue admin accounts, audit anti-virus configuration, and monitor for unusual administrator and SSH activity.