Backdoor

Verified writeups for the Backdoor machine of Hack The Box

Backdoor

$ tldr WordPress LFI → /proc/cmdline a RCE → screen session hijack

·	·
Operating system	Linux
Difficulty	Easy
Vector	Web
IP	10.10.11.125
Retirement date	2022-04-23
Skills	WordPress Local File Inclusion Vulnerability (LFI) LFI to RCE (Abusing /proc/PID/cmdline) Gdbserver RCE Vulnerability Abusing Screen (Privilege Escalation) [Session synchronization]

Writeups

Language	Author	Format	Link
🇪🇸 ES	S4vitar	Vídeo	Open
🇪🇸 ES	El Pingüino de Mario	Vídeo	Open
🇬🇧 EN	0xdf	Texto	Open
🇬🇧 EN	IppSec	Vídeo	Open

Skill resources

Curated documentation for each technique listed in the Skills column above. Sources: HackTricks, GTFOBins, PortSwigger, etc.

Skill	Source	Link
Local File Inclusion (LFI)	HackTricks	Open
Local File Inclusion (LFI)	PayloadsAllTheThings	Open
WordPress Exploitation	HackTricks	Open
Remote Code Execution (RCE)	HackTricks	Open

Related skills worth mastering

Remote File Inclusion (RFI) · Shellshock (CVE-2014-6271)

If you liked this machine, try

• CrimeStoppers — Linux, Hard
• Poison — Linux, Medium
• Monitors — Linux, Hard
• TartarSauce — Linux, Medium
• Travel — Linux, Hard

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Last updated: 2026-06-07