Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
💎
💎 RubyGems
Not in CISA KEV
CRITICAL severity

CVE-2013-2512 — ftpd

CRITICALFix: wconrad/ftpd@828064f

CVE-2013-2512 is a critical-severity (CVSS 9.8) OS Command Injection vulnerability in ftpd. 1 public exploit reference exists, so weaponization risk is real. A fix is available for ftpd — see the affected versions and patch details below.

OS Command Injection in ftpd

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
3.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs89th percentile — riskier than 89% of all scored CVEsHighest risk
2.34%2.91%3.48%4.04%2.8%3.5%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2013-2512 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
💎ftpd

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.

Description

The ftpd gem 0.2.1 for Ruby allows remote attackers to execute arbitrary OS commands via shell metacharacters in a LIST or NLST command argument within FTP protocol traffic.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemsftpdall versions0.2.2bundle update ftpd --conservative

Affected Products

1 product · 1 configurations
Application
ftpdftpd_project
1 version
0.2.1
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The ftpd gem 0.2.1 for Ruby allows remote attackers to execute arbitrary…

vapidlabs.comNVDFeb 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ftpd, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update ftpd to 0.2.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-2512 is resolved across your whole dependency graph.

  3. Workarounds

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

The ftpd gem 0.2.1 for Ruby allows remote attackers to execute arbitrary OS commands via shell metacharacters in a LIST or NLST command argument within FTP protocol traffic.
O3 Security · Impact-Aware SCA

Is CVE-2013-2512 in your dependencies?

Find it across RubyGems, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2013-2512: ftpd — Fixed in 0.2.2