CVE-2015-3306

ProFTPD Improper Access Control

10.0 CRITICALActively exploited (CISA KEV)Public exploitEPSS 99.5%

Published18 May 2015
Added to CISA KEV8 Oct 2026
Remediation due11 Oct 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Proftpd1.3.5

Debian Linux7.0 · 8.0 · 9.0

Fedoraproject Fedora20 · 21 · 22

Opensuse Tumbleweedall versions

Suse Linux Enterprise Server15

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157053.htmlBroken LinkMailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157054.htmlBroken LinkMailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157581.htmlBroken LinkMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-06/msg00020.htmlMailing ListThird Party Advisory
http://packetstormsecurity.com/files/131505/ProFTPd-1.3.5-File-Copy.htmlThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/131555/ProFTPd-1.3.5-Remote-Command-Execution.htmlThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/131567/ProFTPd-CPFR-CPTO-Proof-Of-Concept.htmlExploitVDB Entry
http://packetstormsecurity.com/files/132218/ProFTPD-1.3.5-Mod_Copy-Command-Execution.htmlExploitVDB Entry
http://packetstormsecurity.com/files/162777/ProFTPd-1.3.5-Remote-Command-Execution.htmlExploitVDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-3306US Government Resource

and 5 more references

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2015-3306 being actively exploited?

Yes. CVE-2015-3306 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 8 Oct 2026.

How severe is CVE-2015-3306?

CVE-2015-3306 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 99.5% probability of exploitation.

Which products are affected by CVE-2015-3306?

Affected products include Proftpd, Debian Linux, Fedoraproject Fedora, Opensuse Tumbleweed, Suse Linux Enterprise Server.

How do I fix CVE-2015-3306?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2015-3306 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.