CVE-2015-7541: The initialize method in the Histogram class in lib/colorscore/histogram.rb in the colorscore gem before 0.0.5

Q: How do I fix CVE-2015-7541?

colorscore: upgrade to newer than 0.0.4. Exact commands for each OS are on this page.

Q: Is CVE-2015-7541 being exploited?

CVE-2015-7541 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-7541 affect?

CVE-2015-7541 affects colorscore. Severity is critical (CVSS 10.0). The initialize method in the Histogram class in lib/colorscore/histogram.rb in the colorscore gem before 0.0.5 for Ruby allows context-dependent attackers to execute arbitrary code via shell metacharacters in the (1) image_path, (2) colors,

Q: How urgent is CVE-2015-7541?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 10.0REMOTEUPGRADE

CVE-2015-7541 is a critical-severity flaw (CVSS 10.0) affecting colorscore. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The initialize method in the Histogram class in lib/colorscore/histogram.rb in the colorscore gem before 0.0.5 for Ruby allows context-dependent attackers to execute arbitrary code via shell metacharacters in the (1) image_path, (2) colors, or (3) depth variable.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.5% (top 11%)
CISA exploited list	No
Weakness	CWE-77
Published	2016-01-08
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: colorscore project

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

Am I affected?

Timeline

2016-01-08 21:59 UTCPublished CVE record published
2026-06-17 00:32 UTCUpdated Record last modified

colorscore project colorscore UPGRADE

Affected: <= 0.0.4

Fixed in: newer than 0.0.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.0.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade colorscore

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade colorscore

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2015-7541?

colorscore: upgrade to newer than 0.0.4. Exact commands for each OS are on this page.

Is CVE-2015-7541 being exploited?

CVE-2015-7541 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-2015-7541 affect?

CVE-2015-7541 affects colorscore. Severity is critical (CVSS 10.0). The initialize method in the Histogram class in lib/colorscore/histogram.rb in the colorscore gem before 0.0.5 for Ruby allows context-dependent attackers to execute arbitrary code via shell metacharacters in the (1) image_path, (2) colors,

How urgent is CVE-2015-7541?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Ruby vulnerabilities

References

← Back to latest CVEs