CVE-2010-20103
CRITICALCVSS v3
9.8
CRITICAL
EPSS Score
85.1%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor implements a hidden FTP command trigger that, when invoked, causes the server to execute arbitrary shell commands with root privileges. This allows remote, unauthenticated attackers to run any OS command on the FTP server host.
Technical Details
- Published
- 8/20/2025
Frequently Asked Questions
What is CVE-2010-20103?
A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor implements a hidden FTP command trigger that, when invoked, causes the server to execute arbitrary shell commands with root privileges. This allows remote, unauthenticated attackers to run any OS command on the FTP server host.
Is CVE-2010-20103 actively exploited?
Active exploitation of CVE-2010-20103 has not been confirmed. The EPSS score is 85.1%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2010-20103?
CVE-2010-20103 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2010-20103 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.