ProFTPD Improper Access Control Vulnerability

CRITICAL 10.0EXPLOITED (CISA KEV)CVE-2015-3306 · Published 18/05/2015 · updated 09/10/2026

ProFTPD Improper Access Control Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 08/10/2026. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
proftpd proftpd	`= 1.3.5`	No fix yet

Description

The mod_copy module in ProFTPD 1.3.5 allows remote attackers to read and write to arbitrary files via the site cpfr and site cpto commands.

References

lists.fedoraproject.org/pipermail/package-announce/2015-May/157053.html · Broken Link
lists.fedoraproject.org/pipermail/package-announce/2015-May/157054.html · Broken Link
lists.fedoraproject.org/pipermail/package-announce/2015-May/157581.html · Broken Link
lists.opensuse.org/opensuse-updates/2015-06/msg00020.html · Mailing List
packetstormsecurity.com/files/131505/ProFTPd-1.3.5-File-Copy.html · Third Party Advisory
packetstormsecurity.com/files/131555/ProFTPd-1.3.5-Remote-Command-Execution.html · Third Party Advisory
packetstormsecurity.com/files/131567/ProFTPd-CPFR-CPTO-Proof-Of-Concept.html · Exploit
packetstormsecurity.com/files/132218/ProFTPD-1.3.5-Mod_Copy-Command-Execution.html · Exploit
packetstormsecurity.com/files/162777/ProFTPd-1.3.5-Remote-Command-Execution.html · Exploit
debian.org/security/2015/dsa-3263 · Mailing List
rapid7.com/db/modules/exploit/unix/ftp/proftpd_modcopy_exec · Third Party Advisory
securityfocus.com/bid/74238 · Third Party Advisory
exploit-db.com/exploits/36742 · Exploit
exploit-db.com/exploits/36803 · Exploit
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2015-3306

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