CVE-2020-16254: The Chartkick gem through 3.3.2 for Ruby allows Cascading Style Sheets (CSS) Injection (without attribute).

Q: How do I fix CVE-2020-16254?

chartkick: upgrade to newer than 3.3.2. Exact commands for each OS are on this page.

Q: Is CVE-2020-16254 being exploited?

CVE-2020-16254 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-2020-16254 affect?

CVE-2020-16254 affects chartkick. Severity is medium (CVSS 6.1). The Chartkick gem through 3.3.2 for Ruby allows Cascading Style Sheets (CSS) Injection (without attribute).

Q: How urgent is CVE-2020-16254?

Priority 40/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2020-16254 is a medium-severity flaw (CVSS 6.1) affecting chartkick. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Chartkick gem through 3.3.2 for Ruby allows Cascading Style Sheets (CSS) Injection (without attribute).

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-74
Published	2020-08-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: chartkick project

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

Am I affected?

Timeline

2020-08-05 20:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

chartkick project chartkick UPGRADE

Affected: <= 3.3.2

Fixed in: newer than 3.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.3.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chartkick

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-2020-16254?

chartkick: upgrade to newer than 3.3.2. Exact commands for each OS are on this page.

Is CVE-2020-16254 being exploited?

CVE-2020-16254 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-2020-16254 affect?

CVE-2020-16254 affects chartkick. Severity is medium (CVSS 6.1). The Chartkick gem through 3.3.2 for Ruby allows Cascading Style Sheets (CSS) Injection (without attribute).

How urgent is CVE-2020-16254?

Priority 40/100. Public exploit reference

Software pages

Ruby vulnerabilities

Related CVEs

CVE-2019-12732 MEDIUM 4.7 UPGRADE The Chartkick gem through 3.1.0 for Ruby allows XSS.

References

← Back to latest CVEs