The Load Balancer Kept Working While a Hidden Backdoor Stole Credentials

Two South Korean organisations kept serving traffic through HAProxy while a hidden plugin stole credentials, hijacked sessions and altered pages for selected visitors.
Vulnerabilities, defensive security, architecture and operational security.

Two South Korean organisations kept serving traffic through HAProxy while a hidden plugin stole credentials, hijacked sessions and altered pages for selected visitors.

A modified ScreenConnect client can transfer and run malware when a new support session connects. The first infection still needs social engineering, but one trusted remote session can become the bridge to the next PC.

ASUS Control Center can manage an entire fleet. One critical flaw can turn that reach against every server, PC and workstation connected to it, without requiring an account or a click.

Four MikroTik RouterOS vulnerabilities now have exploitation evidence across CERT Polska and CISA. The documented MikroTrick chain remains limited to two of them. Patch to the correct branch level, then inspect exposed routers for compromise.

Adobe has patched the exploited StyleSmuggler flaw. Magento and Commerce operators still need to check for compromise, verify the right hotfix and rotate exposed credentials.

Millions of messages a day used invisible Unicode characters to split high-signal finance words. Humans saw “funding.” Some security pipelines saw something else.

Four linked Cleo Harmony weaknesses let a low-privilege user cross SAML and token trust boundaries, become an administrator and reach operating-system command execution.

A PostgreSQL account trusted to replicate data could cross into the operating system. The flaw survived for 12 years, but exploitation still requires the powerful REPLICATION privilege.

FalconFlank turns CrowdStrike Falcon’s Office macro clean-up into a path from a low-privilege Windows account to SYSTEM. The public PoC has been independently reproduced.

A critical Cisco Nexus 9000 flaw exposes root-level remote code execution through TCP ports 43210 and 43211 on affected Silicon One switches.