How severe is CVE-2021-44093?

CVE-2021-44093 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-2021-44093 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44093?

CVE-2021-44093 affects Zrlog. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44093?

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-2021-44093 published?

CVE-2021-44093 was published on 2021-11-28 and last updated on 2026-06-17.

CVE-2021-44093

CVE-2021-44093 is a critical-severity vulnerability in Zrlog 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Zrlog
Published: 2021-11-28
Last modified: 2026-06-17

Description

A Remote Command Execution vulnerability on the background in zrlog 2.2.2, at the upload avatar function, could bypass the original limit, upload the JSP file to get a WebShell

Frequently asked questions

What is CVE-2021-44093?: A Remote Command Execution vulnerability on the background in zrlog 2.2.2, at the upload avatar function, could bypass the original limit, upload the JSP file to get a WebShell
How severe is CVE-2021-44093?: CVE-2021-44093 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-2021-44093 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44093?: CVE-2021-44093 affects Zrlog. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44093?: 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-2021-44093 published?: CVE-2021-44093 was published on 2021-11-28 and last updated on 2026-06-17.

References

https://github.com/94fzb/zrlog/issues/115

Affected products (1)

cpe:2.3:a:zrlog:zrlog:2.2.2:*:*:*:*:*:*:*

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