How severe is CVE-2021-46063?

CVE-2021-46063 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-46063 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46063?

CVE-2021-46063 affects Mingsoft Mcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-46063?

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-2021-46063 published?

CVE-2021-46063 was published on 2022-02-18 and last updated on 2026-06-17.

CVE-2021-46063

CVE-2021-46063 is a critical-severity vulnerability in Mingsoft Mcms with a CVSS 3.x base score of 9.1. 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Mingsoft Mcms
Published: 2022-02-18
Last modified: 2026-06-17

Description

MCMS v5.2.5 was discovered to contain a Server Side Template Injection (SSTI) vulnerability via the Template Management module.

Frequently asked questions

What is CVE-2021-46063?: MCMS v5.2.5 was discovered to contain a Server Side Template Injection (SSTI) vulnerability via the Template Management module.
How severe is CVE-2021-46063?: CVE-2021-46063 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-46063 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46063?: CVE-2021-46063 affects Mingsoft Mcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-46063?: 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-2021-46063 published?: CVE-2021-46063 was published on 2022-02-18 and last updated on 2026-06-17.

References

https://github.com/ming-soft/MCMS/issues/59

Affected products (1)

cpe:2.3:a:mingsoft:mcms:5.2.5:*:*:*:*:*:*:*

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