What is CVE-2023-0777?

CVE-2023-0777 is a critical-severity vulnerability in Modoboa, classified under Authentication Bypass by Primary Weakness. CVSS score: 9.8/10. Published 2023-02-10.

How severe is CVE-2023-0777?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-0777 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Modoboa

CVE-2023-0777

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

Published 2023-02-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.152 (96.6th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.152 · newest: 0.152 · change: 0.000

Affected products

Modoboa
Modoboa Modoboa/modoboa — versions unspecified

Weakness classification (CWE)

CWE-305 — Authentication Bypass by Primary Weakness

Public proof-of-concept exploits

7h3h4ckv157/7h3h4ckv157

References

huntr.dev/bounties/a17e7a9f-0fee-4130-a522-5a0466fc17c7 (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/modoboa/modoboa/commit/47d17ac6643f870719691073956a26e4be0a4806 (Patch)
packetstormsecurity.com/files/171744/modoboa-2.0.4-Admin-Takeover.html

Frequently asked questions

What is CVE-2023-0777?: CVE-2023-0777 is a critical-severity vulnerability in Modoboa, classified under Authentication Bypass by Primary Weakness. CVSS score: 9.8/10. Published 2023-02-10.
How severe is CVE-2023-0777?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-0777 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.