How severe is CVE-2020-5241?

CVE-2020-5241 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-5241 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5241?

CVE-2020-5241 affects Matestack Ui-core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5241?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-5241 published?

CVE-2020-5241 was published on 2020-02-13 and last updated on 2026-06-17.

CVE-2020-5241

CVE-2020-5241 is a high-severity vulnerability in Matestack Ui-core with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.7)
CVSS v2: 3.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Matestack Ui-core
Published: 2020-02-13
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is 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.
How severe is CVE-2020-5241?: CVE-2020-5241 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-5241 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5241?: CVE-2020-5241 affects Matestack Ui-core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5241?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-5241 published?: CVE-2020-5241 was published on 2020-02-13 and last updated on 2026-06-17.

References

https://github.com/matestack/matestack-ui-core/security/advisories/GHSA-3jqw-vv45-mjhh

Affected products (1)

cpe:2.3:a:matestack:ui-core:*:*:*:*:*:ruby:*:*

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