CVE-2020-5241: matestack-ui-core (RubyGem) before 0.7.4 is vulnerable to XSS/Script injection

Q: How do I fix CVE-2020-5241?

ui-core: upgrade to 0.7.4. Exact commands for each OS are on this page.

Q: Is CVE-2020-5241 being exploited?

CVE-2020-5241 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-2020-5241 affect?

CVE-2020-5241 affects ui-core. Severity is high (CVSS 7.7). matestack-ui-core (RubyGem) before 0.7.4 is vulnerable to XSS/Script injection. This vulnerability is patched in version 0.7.4.

Q: How urgent is CVE-2020-5241?

Priority 44/100. High severity; Public exploit reference

This month

HIGH 7.7UPGRADE

CVE-2020-5241 is a high-severity flaw (CVSS 7.7) affecting ui-core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

matestack-ui-core (RubyGem) before 0.7.4 is vulnerable to XSS/Script injection. This vulnerability is patched in version 0.7.4.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-80, CWE-79
Published	2020-02-13
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: matestack

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

Am I affected?

Timeline

2020-02-13 00:15 UTCPublished CVE record published
2026-06-17 03:21 UTCUpdated Record last modified

matestack ui-core UPGRADE

Affected: < 0.7.4

Fixed in: 0.7.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ui-core || rpm -q ui-core || ui-core --version

2. UPGRADE to 0.7.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ui-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ui-core

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-2020-5241?

ui-core: upgrade to 0.7.4. Exact commands for each OS are on this page.

Is CVE-2020-5241 being exploited?

CVE-2020-5241 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-2020-5241 affect?

CVE-2020-5241 affects ui-core. Severity is high (CVSS 7.7). matestack-ui-core (RubyGem) before 0.7.4 is vulnerable to XSS/Script injection. This vulnerability is patched in version 0.7.4.

How urgent is CVE-2020-5241?

Priority 44/100. High severity; Public exploit reference

References

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