Completed another Hack The Box machine, Silentium.

Initial access was achieved by exploiting a password-reset vulnerability in the staging Flowise application, followed by abusing a custom MCP endpoint to obtain a root shell inside the Flowise container. Credentials exposed through the container environment were then used to SSH into the underlying host as ben and retrieve the flag.

For privilege escalation, an internal Gogs instance was discovered through local port forwarding. A malicious symlink was pushed and manipulated through the Gogs API to target /etc/sudoers.d/ben, allowing a passwordless sudo rule to be written and ultimately providing full root access.

#HackTheBox #HTB #CyberSecurity #PenetrationTesting #OffensiveSecurity #Linux #PrivilegeEscalation #WebSecurity #CTF …

Learn MoreHack The Box: Silentium Machine Walkthrough – Easy Difficulity

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Completed the Hack The Box “CobbleStone” Insane machine, chaining multiple vulnerabilities to achieve full system compromise.

Initial access was achieved through SSRF in the skin suggestion feature, followed by SQL injection and stored XSS to compromise the administrator’s session. The stolen session cookie provided admin access, leading to Twig SSTI and RCE as www-data. Database credentials recovered through SSTI enabled a database dump and password cracking, resulting in SSH access as cobble and the user flag.

Local enumeration revealed Cobbler’s XML-RPC service on port 25151. After identifying Cobbler 3.3.6 as vulnerable to CVE-2024-47533, a malicious Cheetah template was used to execute commands with root privileges. This provided a root shell and access to /root/root.txt.

#HackTheBox #HTB #CobbleStone #CyberSecurity #PenetrationTesting #OffensiveSecurity #WebSecurity #SSRF #SQLInjection #XSS #SSTI #PrivilegeEscalation #CVE-2024-47533 …

Learn MoreHackTheBox: CobbleStone Machine Walkthrough – Insane Difficulty

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Completed the Hack The Box "Kobold" machine, an easy-difficulty Linux challenge focused on web exploitation and container-based privilege escalation.

The assessment involved identifying and exploiting an unauthenticated Remote Code Execution vulnerability (CVE-2026-23744) in MCPJam Inspector to gain initial access as the ben user. During the privilege escalation phase, I explored Docker security weaknesses by leveraging excessive group permissions to escape the container environment and obtain root access. Additionally, I analyzed an alternative attack path involving CVE-2025-64714 in PrivateBin, which allowed sensitive configuration data exposure and access to the Arcane container management interface. This machine provided practical experience in vulnerability exploitation, container security assessment, and identifying risks associated with exposed internal services.

#HackTheBox #HTB #CyberSecurity #PenetrationTesting #OffensiveSecurity #RedTeam #Linux #Docker #VulnerabilityManagement #CVE #EthicalHacking #CybersecurityLearning …

Learn MoreHack The Box: Kobold Machine Walkthrough – Easy Difficulty

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Just completed the CCTV machine from Hack The Box!

After enumerating the target, I discovered a ZoneMinder instance exposed on the web interface. Using the default administrative credentials, I gained access to the application and identified a SQL injection vulnerability in the removetag endpoint. By leveraging SQLMap, I extracted the database contents and recovered valid credentials through bcrypt hash cracking with Hashcat, allowing SSH access as the mark user and securing the User flag.

For privilege escalation, I discovered a locally running MotionEye service and extracted authentication details from its configuration files. After accessing the internal web interface through SSH port forwarding, I exploited a command injection vulnerability in the image filename configuration to obtain a root shell and capture the Root flag.

Really enjoyed this Easy-difficulty box — a great combination of web application exploitation, SQL injection, credential recovery, and Linux privilege escalation techniques!

#HackTheBox #HTB #PenetrationTesting #CyberSecurity #PrivilegeEscalation #SQLInjection #EthicalHacking #Linux #OffensiveSecurity …

Learn MoreHack The Box: CCTV machine walkthrough – Easy Difficulty

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Just completed the DevArea machine from Hack The Box!

After exploiting a vulnerable Java SOAP service on port 8080, I gained initial access and discovered Hoverfly running on port 8888. Leveraging CVE-2025-54123, I successfully authenticated and delivered a reverse shell, securing the User flag as the dev_ryan user.

For privilege escalation, I took advantage of a sudo permission on the SysWatch management script. By exploiting a symlink attack in the logging functionality, I was able to read /root/root.txt and capture the Root flag.

Really enjoyed this Medium-difficulty box — great mix of Java deserialization/SOAP, API exploitation, and creative Linux privilege escalation!

#HackTheBox #HTB #PenetrationTesting #CyberSecurity #PrivilegeEscalation #CVE #EthicalHacking …

Learn MoreHack The Box: DevArea Machine Walkthrough – Medium Difficulty

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