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Apexward Pulse
Type Vulnerability

Proftpd

ProFTPD Access Control Flaw Vulnerability

1 sourceCVE-2015-3306

At a glance

High
Suggested 24-hour window, counted from the last update
ActiveConfirmed in-the-wild exploitation
Evidence-weighted, not popularity
Signal

Actively exploited in the wild — prioritise confirming exposure.

Why High

High rather than Critical: exposure is scored at a default because we cannot see your systems or suppliers. If you run or depend on Proftpd, treat it as Critical.

Briefing

  • Do not treat uncorroborated claims as confirmed breaches.

Questions to ask IT

  • Do we run Proftpd, and which versions?
  • Is any of it reachable from the internet?
  • Have we checked whether it has already been used against us?
  • If it is still not patched, what mitigation is in place, and what is holding the fix up?

Next steps

  1. Confirm exposure and remediation status for affected products

Summary

  • 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.
  • CVE-2015-3306 is confirmed as exploited in the wild (US known-exploited catalogue)
  • CVE-2015-3306 has an estimated ~96.8% chance of attack in 30 days (99.9th percentile) as of 2026-10-08 — probability signal, not confirmed exploitation
  • Authoritative catalogues report active exploitation of this vulnerability.

Products and services involved

  • Proftpd90% match confidence · CVE-2015-3306
13 reports

Part of Adobe Commerce and Magento Improper Neutralization of Special Elements Used in a Template Engine Vulnerability

All 13 reports in this story

Pulse

Last checked 3d ago · Recheck overdue since 6 Nov 2026, 09:35 UK time

  1. Story8 Oct 2026, 20:02 UK time · 8 Oct

    Linked reporting from CISA (official authority).

    Read source (CISA Known Exploited Vulnerabilities)
  2. Update5 Nov 2026, 09:35 UK time · 3d ago

    held at 96.8%; ranking metadata was updated.

2 entries so far. The timeline chart appears once this story has more history.

Sources

How we know

Statements extracted from sources. Higher confidence means stronger corroboration.

  • ConfirmedHeadline90% confidence

    ProFTPD Improper Access Control Vulnerability

  • ConfirmedSummary fact75% confidence

    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.

  • ConfirmedCVE identifier95% confidence

    Event involves CVE-2015-3306

  • ConfirmedKnown-exploited catalogue98% confidence

    CVE-2015-3306 is confirmed as exploited in the wild (US known-exploited catalogue)

  • ConfirmedEstimated attack likelihood95% confidence

    CVE-2015-3306 has an estimated ~96.8% chance of attack in 30 days (99.9th percentile) as of 2026-10-08 — probability signal, not confirmed exploitation