CVE-2020-16254

CSS Injection in Chartkick gem

6.1 MediumFix available

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

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.76%Up 0.1 points since Apr 14, 2021

What each source reports

NVD Score used 6.1

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

Record: CVE-2020-16254
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-74
Updated: 2026-11-02

CVE List No score

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

Record: CVE-2020-16254
Updated: 2026-11-02

EUVDEUVD-2020-0584 No score

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

Record: EUVD-2020-0584
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3j95-fjv2-3m4p 6.1

CSS Injection in Chartkick gem

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

Record: GHSA-3j95-fjv2-3m4p
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-74
Updated: 2026-11-02

OSV 6.1

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

Record: CVE-2020-16254
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVGHSA-3j95-fjv2-3m4p 6.1

CSS Injection in Chartkick gem

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

Record: GHSA-3j95-fjv2-3m4p
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-74
Updated: 2026-11-02

Affected products

chartkick project chartkick

Affected packages

Affected packages
Package	Affected	Fixed
`chartkick` RubyGems	before 3.4.0	3.4.0
`chartkick` RubyGems	before 3.4.0, plus listed versions 0.0.10.0.20.0.30.0.40.0.5 Show 45 moreShow less 1.0.01.0.11.1.01.1.11.1.21.1.31.2.01.2.11.2.21.2.31.2.41.2.51.3.01.3.11.3.21.4.01.4.11.4.21.5.01.5.11.5.22.0.02.0.12.0.22.1.02.1.12.1.22.1.32.2.02.2.12.2.22.2.32.2.42.2.52.3.02.3.12.3.22.3.32.3.42.3.53.0.03.0.13.0.23.1.03.2.0	3.4.0

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-16254 is a medium vulnerability (CVSS 6.1) in Chartkick Project Chartkick, published August 5, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.76%, the 55th percentile. Fixed in chartkick 3.4.0.

References

This page doesn't list everything

Left out here: 5 versions. The JSON record has them.