What is CVE-2020-5241?

CVE-2020-5241 is a high-severity vulnerability in Matestack Matestack-Ui-Core, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 7.7/10. Published 2020-02-13.

How severe is CVE-2020-5241?

High severity. CVSS v3 base score is 7.7 out of 10.

XSS in Matestack Matestack-Ui-Core

CVE-2020-5241

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

Published 2020-02-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Matestack Matestack-Ui-Core — versions < 0.7.4
Matestack Ui-Core

Weakness classification (CWE)

References

github.com/matestack/matestack-ui-core/security/advisories/GHSA-3jqw-vv45-mjhh (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-5241?: CVE-2020-5241 is a high-severity vulnerability in Matestack Matestack-Ui-Core, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 7.7/10. Published 2020-02-13.
How severe is CVE-2020-5241?: High severity. CVSS v3 base score is 7.7 out of 10.