How severe is CVE-2013-1756?

No CVSS score has been assigned to CVE-2013-1756 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2013-1756?

CVE-2013-1756 affects the following packages: dragonfly (RubyGems), dragonfly (RubyGems). Ecosystems affected: RubyGems.

How do I fix CVE-2013-1756?

Update dragonfly to 0.8.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-1756 is resolved across your whole dependency graph.

How do I detect CVE-2013-1756 in my RubyGems dependencies?

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

How do I mitigate CVE-2013-1756 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2013-1756?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2013-1756 can be triaged on real exposure rather than presence alone.

Is CVE-2013-1756 actively exploited in the wild?

No public exploit code has been indexed for CVE-2013-1756 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2013-1756?

CVE-2013-1756 has an EPSS (Exploit Prediction Scoring System) score of 3.7%, placing it in the 89th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2013-1756?

CVE-2013-1756 is classified as Code Injection (CWE-94). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2013-1756 published, and has it been updated?

CVE-2013-1756 was published on October 24, 2017 and was last updated on April 14, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎 RubyGems

Not in CISA KEV

CVE-2013-1756 — dragonfly

Fix: markevans/dragonfly@a8775aa

CVE-2013-1756 is a Code Injection vulnerability in dragonfly. A fix is available for dragonfly — see the affected versions and patch details below.

Dragonfly Code Injection vulnerability

Published

Oct 24, 2017

Updated

Apr 14, 2025

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Sep 24, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

3.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs89th percentile — riskier than 89% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

2 pkgs affected

💎dragonfly💎dragonfly

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 Dragonfly gem 0.7 before 0.8.6 and 0.9.x before 0.9.13 for Ruby, when used with Ruby on Rails, allows remote attackers to execute arbitrary code via a crafted request.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`dragonfly`	≥ 0.7&&< 0.8.6	0.8.6`bundle update dragonfly --conservative`
💎RubyGems	`dragonfly`	≥ 0.9&&< 0.9.13	0.9.13`bundle update dragonfly --conservative`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dragonfly, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update dragonfly to 0.8.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-1756 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2013-1756 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2013-1756. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

The Dragonfly gem 0.7 before 0.8.6 and 0.9.x before 0.9.13 for Ruby, when used with Ruby on Rails, allows remote attackers to execute arbitrary code via a crafted request.

O3 Security · Impact-Aware SCA

Is CVE-2013-1756 in your dependencies?

O3 Security finds CVE-2013-1756 across RubyGems dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works