{"uuid": "15c9665e-d1b7-4016-a4dd-7a7e2a081bde", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2019-9670", "type": "seen", "source": "https://t.me/hacking_Attack/141805", "content": "The Hunt for XXE to LFI: How I Uncovered CVE-2019\u20139670 in a Bug Bounty Program\n\nA few months ago, during one of my late-night bug bounty hunting sessions, I stumbled upon a critical vulnerability that could lead to a full server takeover. The target was a well-known program, and I was determined to dig deep. This is the story of how I discovered the XXE to LFI vulnerability (CVE-2019\u20139670) in my target program.The Discovery While probing the target, I noticed something peculiar about the way their server handled XML inputs. My initial scans revealed that the server was running Synacor Zimbra Collaboration Suite version 8.7.x, which I knew had some known vulnerabilities. Specifically, CVE-2019\u20139670 caught my eye \u2014 an XXE (XML External Entity) vulnerability that could lead to Local File Inclusion (LFI).Understanding the Vulnerability The CVE-2019\u20139670 bug exists in the mailboxd component of Synacor Zimbra Collaboration Suite. This XXE vulnerability allows an attacker to inject malicious XML content that can read sensitive files on the server. If exploited, this flaw could lead to complete server compromise, allowing an attacker to read, create, modify, and delete data on the target server.Steps to Reproduce Armed with this knowledge, I decided to test the vulnerability. Here\u2019s how I did it:Open your terminal and get ready to send some requests.Execute the following CURL command to send a GET request to the vulnerable domain:curl -X POST https://mytargetprogram.com/Autodiscover/Autodiscover.xml -d @payload. xml 3. Craft a malicious payload to exploit the XXE vulnerability: 4. Send the payload and observe the response. If the server responds with file contents like /etc/passwd, you\u2019ve confirmed the vulnerability. 5. Use the following CURL command to test with the crafted payload:curl -X POST -H \"Content-Type: application/xml\" -d @payload.xml https://mytargetprogram.com/Autodiscover/Autodiscover.xml If you receive a response containing sensitive file data, congratulations, you\u2019ve uncovered a critical flaw.Automating the Hunt To streamline the process, I built a Python tool specifically for detecting this vulnerability. You can install it using pip and automate your testing: ToolPOC: CVE-2019\u20139670 on PyPIpip install CVE-2019-9670 CVE-2019-9670 --chatid To Check a Single URL:CVE-2019-9670 -u http://mytargetprogram.comTo Check a List of URLs:CVE-2019-9670 -i urls.txtConclusion After confirming the vulnerability, I reported it to the target program, and they promptly patched the issue. This experience reinforced my belief in continuous learning and adapting, especially in the dynamic field of cybersecurity. If you\u2019re interested in VAPT services or enrolling in my cybersecurity course, feel free to reach out. Stay safe, and happy hunting! POC : POC by: @karthithehacker Mail: contact@karthithehacker.com Website: https://www.karthithehacker.com/ If you\u2019re interested in our VAPT service, contact us at ceo@cappriciosec.com or contact@cappriciosec.com. For enrolling my cybersecurity and Bugbounty course, WhatsApp +91 82709 13635.Connect with me: Twitter: https://twitter.com/karthithehacker Instagram: https://www.instagram.com/karthithehacker/ LinkedIn: https://www.linkedin.com/in/karthikeyan--v/ Website: https://www.karthithehacker.com/ Github : https://github.com/karthi-the-hacker/ npmjs: https://www.npmjs.com/~karthithehacker Youtube: https://www.youtube.com/@karthi_the_hackerThank you Karthikeyan.V The Hunt for XXE to LFI: How I Uncovered CVE-2019\u20139670 in a Bug Bounty Program was originally published in InfoSec Write-ups on Medium, where people are continuing the conversation by highlighting and responding to this story.\nRead more...", "creation_timestamp": "2026-09-02T01:00:49.324183Z"}