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CVE-2015-3306

CRITICAL 10 KNOWN EXPLOITED PoC CATALOGUED DETECTION TEMPLATE ALL-YEARS

Published 2015-05-18 · Last modified 2026-10-09 · mitre · NVD: Analyzed

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.

ACTIVELY EXPLOITED

Confirmed exploited in the wild — in CISA KEV since 2026-10-08. Patch or mitigate now.

Exploitation likelihood

99.5%chance of exploitation in 30 days · 100th percentile

● In CISA KEV (2026-10-08)● Catalogued PoC◆ SSVC: exploitation active, automatable yes

Impact if exploited

10CVSS 3.1 · CRITICAL · ADP

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

Public PoC or exploit resources are catalogued below.

Listed by the named source; Vulnpedia has not tested these resources.

PoC data: JSON

Detection templates

Detection checks are listed separately from PoCs.

Resource commands

nuclei -id CVE-2015-3306 -u https://TARGETDetection template — review its checks and affected versions before use.
searchsploit --cve CVE-2015-3306 && searchsploit -m 37262Fetch the ExploitDB PoC locally; review the code before running it.
searchsploit --cve CVE-2015-3306 && searchsploit -m 36803Fetch the ExploitDB PoC locally; review the code before running it.
searchsploit --cve CVE-2015-3306 && searchsploit -m 49908Fetch the ExploitDB PoC locally; review the code before running it.
searchsploit --cve CVE-2015-3306 && searchsploit -m 36742Fetch the ExploitDB PoC locally; review the code before running it.
curl -s https://vulnpedia.com/cve/CVE-2015-3306/poc.jsonMachine-readable PoC index for this CVE (for automation).

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Fedoraproject Debian Opensuse Suse Proftpd

Products Fedora Debian Linux Tumbleweed Linux Enterprise Server Proftpd

Weakness (CWE)

  • CWE-284: Improper Access Control

CVSS vector

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

References and research data (JSON)

Vendor product assessments

  • All currently supported Red Hat products · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    Red Hat · CVE-2015-3306 · Updated 2026-10-09T02:00:22+00:00

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

18 candidates

Additional exploitation reports

Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.

  • VulnCheck KEV · 2026-10-08T00:00:00Z

    Source guidance: 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.

    Source ransomware assessment: Unknown

    VulnCheck KEV · CVE-2015-3306 · Updated 2026-10-08T00:00:00Z
  • VulnCheck KEV · 2026-10-08T00:00:00ZVulnCheck KEV · CVE-2015-3306
    VulnCheck KEV · CVE-2015-3306

Known Affected Software Configurations

VendorProductVersion range
FedoraprojectFedora20
FedoraprojectFedora21
FedoraprojectFedora22
DebianDebian Linux7.0
DebianDebian Linux8.0
DebianDebian Linux9.0
OpensuseTumbleweed*
SuseLinux Enterprise Server15
SuseLinux Enterprise Server15
ProftpdProftpd1.3.5

All CVSS metrics

  • CRITICAL 10 v3.1 · ADP Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • CRITICAL 10 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • HIGH 10 v2.0 · NVD Primary
    AV:N/AC:L/Au:N/C:C/I:C/A:C

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS