How severe is CVE-2023-0777?

CVE-2023-0777 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-2023-0777 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0777?

CVE-2023-0777 affects Modoboa. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-0777?

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-2023-0777 published?

CVE-2023-0777 was published on 2023-02-10 and last updated on 2026-06-17.

CVE-2023-0777

CVE-2023-0777 is a critical-severity vulnerability in Modoboa with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-305.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-305
Affected product: Modoboa
Published: 2023-02-10
Last modified: 2026-06-17

Description

Authentication Bypass by Primary Weakness in GitHub repository modoboa/modoboa prior to 2.0.4.

Frequently asked questions

What is CVE-2023-0777?: Authentication Bypass by Primary Weakness in GitHub repository modoboa/modoboa prior to 2.0.4.
How severe is CVE-2023-0777?: CVE-2023-0777 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-2023-0777 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0777?: CVE-2023-0777 affects Modoboa. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-0777?: 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-2023-0777 published?: CVE-2023-0777 was published on 2023-02-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:modoboa:modoboa:*:*:*:*:*:*:*:*

More vulnerabilities in Modoboa

CVE-2023-2227 — Critical (CVSS 9.1): Improper Authorization in GitHub repository modoboa/modoboa prior to 2.1.0.
CVE-2023-5690 — High (CVSS 8.8): Cross-Site Request Forgery (CSRF) in GitHub repository modoboa/modoboa prior to 2.2.2.
CVE-2026-27602 — High (CVSS 7.2): Modoboa is a mail hosting and management platform. Prior to version 2.7.1, `exec_cmd()` in `modoboa/lib/sysutils.py`…
CVE-2023-2228 — Medium (CVSS 6.8): Cross-Site Request Forgery (CSRF) in GitHub repository modoboa/modoboa prior to 2.1.0.
CVE-2023-0438 — Medium (CVSS 6.5): Cross-Site Request Forgery (CSRF) in GitHub repository modoboa/modoboa prior to 2.0.4.
CVE-2023-0398 — Medium (CVSS 6.5): Cross-Site Request Forgery (CSRF) in GitHub repository modoboa/modoboa prior to 2.0.4.

All CVEs affecting Modoboa →

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