How severe is CVE-2021-43703?

CVE-2021-43703 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-2021-43703 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43703?

CVE-2021-43703 affects Zzcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43703?

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-2021-43703 published?

CVE-2021-43703 was published on 2021-12-09 and last updated on 2026-06-17.

CVE-2021-43703

CVE-2021-43703 is a critical-severity vulnerability in Zzcms 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% (76th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zzcms
Published: 2021-12-09
Last modified: 2026-06-17

Description

An Incorrect Access Control vulnerability exists in zzcms less than or equal to 2019 via admin.php. After disabling JavaScript, you can directly access the administrator console.

Frequently asked questions

What is CVE-2021-43703?: An Incorrect Access Control vulnerability exists in zzcms less than or equal to 2019 via admin.php. After disabling JavaScript, you can directly access the administrator console.
How severe is CVE-2021-43703?: CVE-2021-43703 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-2021-43703 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43703?: CVE-2021-43703 affects Zzcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43703?: 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-2021-43703 published?: CVE-2021-43703 was published on 2021-12-09 and last updated on 2026-06-17.

References

https://github.com/forget-code/zzcms/issues/1

Affected products (1)

cpe:2.3:a:zzcms:zzcms:*:*:*:*:*:*:*:*

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