CVE-2015-3306
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.
- 10.0CriticalCVSS base score
- 99.5%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- YesKnown exploitedin CISA's KEV since 8 Oct 2026
- 6Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as ProFTPD Improper Access Control Vulnerability.
- Added
- 8 Oct 2026
- Fix due (US federal)
- 11 Oct 2026
- Used by ransomware
- Not known
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 8 Oct 2026.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module, a Nuclei template and 4 Exploit-DB entries for it. 2 references of the record are tagged as an exploit. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits8
Metasploit modules1 module
- ProFTPD 1.3.5 Mod_Copy Command Execution (Metasploit module) (opens in a new tab)
exploit/unix/ftp/proftpd_modcopy_execRank excellentdisclosed 22 Apr 2015
Nuclei templates1 template
- ProFTPd - Remote Code Execution (Nuclei template) (opens in a new tab)
network/cves/2015/CVE-2015-3306.yamlSeverity critical
Exploit-DB4 entries
- ProFTPd 1.3.5 - 'mod_copy' Remote Command Execution (2) (Exploit-DB entry) (opens in a new tab)
EDB-ID 49908remote, linuxpublished 26 May 2021Verified
- ProFTPd 1.3.5 - 'mod_copy' Command Execution (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 37262remote, linuxpublished 10 Jun 2015Verified
- ProFTPd 1.3.5 - 'mod_copy' Remote Command Execution (Exploit-DB entry) (opens in a new tab)
EDB-ID 36803remote, linuxpublished 21 Apr 2015Not verified
- ProFTPd 1.3.5 - File Copy (Exploit-DB entry) (opens in a new tab)
EDB-ID 36742remote, linuxpublished 13 Apr 2015Verified
References tagged exploit2 references
- 36803 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 36742 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 33 days later
· 33 days later
Published
- 11 years later
· 11 years later
Added to CISA KEV
Known exploited in the wild
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 99.5% · top 0.1% of all CVEs (9 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.
Affected products
n/a
- affected n/a
References
15
- http://www.rapid7.com/db/modules/exploit/unix/ftp/proftpd_modcopy_exec (opens in a new tab)x_refsource_MISCx_transferred
- 36803 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- http://packetstormsecurity.com/files/131555/ProFTPd-1.3.5-Remote-Command-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- DSA-3263 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- http://packetstormsecurity.com/files/131567/ProFTPd-CPFR-CPTO-Proof-Of-Concept.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/132218/ProFTPD-1.3.5-Mod_Copy-Command-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- openSUSE-SU-2015:1031 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FEDORA-2015-7164 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2015-6401 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 74238 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 36742 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- FEDORA-2015-7086 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- http://packetstormsecurity.com/files/131505/ProFTPd-1.3.5-File-Copy.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/162777/ProFTPd-1.3.5-Remote-Command-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-3306 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2015-3352 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2015-3306)Record last updated .