CVE-2013-1756: 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 remo

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HIGH 7.5DOWNGRADE

CVE-2013-1756 is a high-severity flaw (CVSS 7.5) affecting dragonfly gem. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-94
Published	2014-06-09
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mark evans

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-06-09 19:55 UTCPublished CVE record published
2026-06-16 23:52 UTCUpdated Record last modified

mark evans dragonfly gem DOWNGRADE

Affected: 0.7.0 · 0.7.1 · 0.7.2 · 0.7.3 · 0.7.4 · 0.7.5 · 0.7.6 · 0.7.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.7.0

1. Check installed version

apt-cache policy dragonfly-gem || rpm -q dragonfly-gem || dragonfly-gem --version

2. No fixed release: DOWNGRADE to a release before 0.7.0 (Debian / Ubuntu)

apt-cache madison dragonfly-gem sudo apt install dragonfly-gem=<VERSION_BEFORE_0.7.0> sudo apt-mark hold dragonfly-gem

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list dragonfly-gem sudo dnf downgrade dragonfly-gem-<VERSION_BEFORE_0.7.0> sudo dnf versionlock add dragonfly-gem

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-1756?

dragonfly gem: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-1756 being exploited?

CVE-2013-1756 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-1756 affect?

CVE-2013-1756 affects dragonfly gem. Severity is high (CVSS 7.5). 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.

How urgent is CVE-2013-1756?

Priority 49/100. High severity

Software pages

Ruby on Rails vulnerabilities · Ruby vulnerabilities

References

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