CVE-2010-20121
EasyFTP Server <= 1.7.0.11 CWD Command Stack Buffer Overflow
Vexday Risk Score
63High priority
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 9.3EPSS 3.0%KEV nãoPoC públicaNuclei —Metasploit simPatch —
Lifecycle
16 Feb 2010Metasploit module available
21 Aug 2025Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
KMiNT21 Software · EasyFTP Serverpublic PoCs found — 7
cve_referencepaulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/unverifiedcve_referenceraw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rbunverifiedcve_referenceseclists.org/bugtraq/2010/Feb/202unverifiedcve_referencewww.exploit-db.com/exploits/11668unverifiedcve_referencewww.exploit-db.com/exploits/12312unverifiedcve_referencewww.exploit-db.com/exploits/14402unverifiedcve_referencewww.exploit-db.com/exploits/16737unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rbhttps://seclists.org/bugtraq/2010/Feb/202https://www.exploit-db.com/exploits/11668https://www.exploit-db.com/exploits/12312https://www.exploit-db.com/exploits/14402https://www.exploit-db.com/exploits/16737https://www.vulncheck.com/advisories/easyftp-server-cwd-command-stack-buffer-overflow