Post by Securitum

Legacy systems can run for years without much attention, but that does not mean they are safe. In our latest write up, Marek Kaliszczyk from our team shows what happened during a code review of a large legacy financial application: behind a stable looking system, he found multiple critical issues hidden in older components and outdated design choices. ⚠️ Those included three separate deserialization paths, JWT weaknesses, hardcoded secrets, and unsafe XML parsing that opened the door to serious compromise. ⚠️ What makes this case important is that none of these problems came from one "flashy" bug. They came from technical debt building up over time: old libraries, insecure defaults, and trust in mechanisms that should have been retired long ago. The article walks through how these vulnerabilities appeared in real code and, just as importantly, what should be done next: update vulnerable libraries, remove hardcoded cryptographic material, lock down XML parsers, and stop relying on unsafe deserialization paths. Full article → https://lnkd.in/dTSSZyPj #CyberSecurity #AppSec #InfoSec #Pentesting  #PentestChronicles