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CVE-2023-0777

50
FAUCET Score

CVE-2023-0777 is a critical authentication bypass vulnerability (CVSS 9.8) affecting Modoboa versions prior to 2.0.4. This flaw allows unauthenticated attackers to gain full administrative control over affected Modoboa instances due to a primary weakness in its authentication mechanism. While not currently listed in CISA's KEV catalog, public exploit code and Nuclei templates are available, indicating a high potential for exploitation. Despite this, there is minimal community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.4CPE matchmatch criteria
cpe:2.3:a:modoboa:modoboa:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.6HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
15.09%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Nuclei: CVE-2023-0777 · Oct 17, 2023
ExploitDB: EDB-51276 · Apr 6, 2023
This CVE's current EPSS score of 0.1509 is in the 92nd percentile among its peer group of 36,833 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: modoboaFixed in: 2.0.4

Vendor Advisories (1)

pipGHSA-rfhw-fm4m-52j6critical

Authentication Bypass in modoboa

Feb 10, 2023

References

packetstormsecurity.com / files/171744/modoboa-2.0.4-Admin-Takeover.html
github.com / modoboa/modoboa/commit/47d17ac6643f870719691073956a26e4be0a4806
Patch
huntr.dev / bounties/a17e7a9f-0fee-4130-a522-5a0466fc17c7
ExploitIssue TrackingPatchThird Party Advisory