How severe is CVE-2021-43736?

CVE-2021-43736 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-2021-43736 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43736?

CVE-2021-43736 affects Cmswing. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43736?

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-2021-43736 published?

CVE-2021-43736 was published on 2022-03-23 and last updated on 2026-06-17.

CVE-2021-43736

CVE-2021-43736 is a critical-severity vulnerability in Cmswing 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. The underlying weakness is classified as CWE-88.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-88
Affected product: Cmswing
Published: 2022-03-23
Last modified: 2026-06-17

Description

CmsWing CMS 1.3.7 is affected by a Remote Code Execution (RCE) vulnerability via parameter: log rule

Frequently asked questions

What is CVE-2021-43736?: CmsWing CMS 1.3.7 is affected by a Remote Code Execution (RCE) vulnerability via parameter: log rule
How severe is CVE-2021-43736?: CVE-2021-43736 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-2021-43736 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43736?: CVE-2021-43736 affects Cmswing. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43736?: 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-2021-43736 published?: CVE-2021-43736 was published on 2022-03-23 and last updated on 2026-06-17.

References

https://github.com/arterli/CmsWing/issues/56

Affected products (1)

cpe:2.3:a:cmswing:cmswing:1.3.7:*:*:*:*:*:*:*

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CVE-2020-20294 — Critical (CVSS 9.8): An issue was found in CMSWing project version 1.3.8. Because the log function does not check the log parameter,…
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