ProFTPD · ProFTPD

CVE-2015-3306

ProFTPD Improper Access Control Vulnerability

Exploited in attacks Critical 10.0 Attack chance: 99.5%

What it is

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.

CISA: ProFTPD contains an improper access control vulnerability that could allow remote attackers to read and write to arbitrary files via the site cpfr and site cpto commands.

What to do

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.

Deadline for US federal agencies: October 11, 2026

Added to the CISA list: October 8, 2026
Published: May 18, 2015
Severity: Critical 10.0 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): 99.5% in the top 0.1% of all known vulnerabilities
Weakness: CWE-284
More details: NVD · CVE.org · CISA

All references (14)

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.