How severe is CVE-2021-42242?

CVE-2021-42242 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-42242 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42242?

CVE-2021-42242 affects Jflyfox Jfinal Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42242?

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

When was CVE-2021-42242 published?

CVE-2021-42242 was published on 2022-05-05 and last updated on 2026-06-17.

CVE-2021-42242

CVE-2021-42242 is a critical-severity vulnerability in Jflyfox Jfinal Cms with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jflyfox Jfinal Cms
Published: 2022-05-05
Last modified: 2026-06-17

Description

A command execution vulnerability exists in jfinal_cms 5.0.1 via com.jflyfox.component.controller.Ueditor.

Frequently asked questions

What is CVE-2021-42242?: A command execution vulnerability exists in jfinal_cms 5.0.1 via com.jflyfox.component.controller.Ueditor.
How severe is CVE-2021-42242?: CVE-2021-42242 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-42242 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42242?: CVE-2021-42242 affects Jflyfox Jfinal Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42242?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-42242 published?: CVE-2021-42242 was published on 2022-05-05 and last updated on 2026-06-17.

References

https://github.com/jflyfox/jfinal_cms/issues/28

Affected products (1)

cpe:2.3:a:jflyfox:jfinal_cms:5.0.1:*:*:*:*:*:*:*

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