How severe is CVE-2023-1877?

CVE-2023-1877 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-2023-1877 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-2023-1877?

CVE-2023-1877 affects Microweber. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-1877?

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-2023-1877 published?

CVE-2023-1877 was published on 2023-04-05 and last updated on 2026-06-17.

CVE-2023-1877

CVE-2023-1877 is a critical-severity vulnerability in Microweber 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-77.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Microweber
Published: 2023-04-05
Last modified: 2026-06-17

Description

Command Injection in GitHub repository microweber/microweber prior to 1.3.3.

Frequently asked questions

What is CVE-2023-1877?: Command Injection in GitHub repository microweber/microweber prior to 1.3.3.
How severe is CVE-2023-1877?: CVE-2023-1877 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-2023-1877 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-2023-1877?: CVE-2023-1877 affects Microweber. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-1877?: 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-2023-1877 published?: CVE-2023-1877 was published on 2023-04-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microweber:microweber:*:*:*:*:*:*:*:*

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