CVE-2014-4994: lib/gyazo/client.rb in the gyazo gem 1.0.0 for Ruby allows local users to write to arbitrary files via a symli

Routine

MEDIUM 5.5DOWNGRADE

CVE-2014-4994 is a medium-severity flaw (CVSS 5.5) affecting gyazo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

lib/gyazo/client.rb in the gyazo gem 1.0.0 for Ruby allows local users to write to arbitrary files via a symlink attack on a temporary file, related to time-based filenames.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-01-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gyazo project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-01-10 18:29 UTCPublished CVE record published
2026-06-17 00:10 UTCUpdated Record last modified

gyazo project gyazo DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy gyazo || rpm -q gyazo || gyazo --version

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison gyazo sudo apt install gyazo=<VERSION_BEFORE_1.0.0> sudo apt-mark hold gyazo

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

dnf --showduplicates list gyazo sudo dnf downgrade gyazo-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add gyazo

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-2014-4994?

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

Is CVE-2014-4994 being exploited?

CVE-2014-4994 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-2014-4994 affect?

CVE-2014-4994 affects gyazo. Severity is medium (CVSS 5.5). lib/gyazo/client.rb in the gyazo gem 1.0.0 for Ruby allows local users to write to arbitrary files via a symlink attack on a temporary file, related to time-based filenames.

How urgent is CVE-2014-4994?

Priority 35/100. Public exploit reference

Software pages

Ruby vulnerabilities

References

← Back to latest CVEs