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CVE-2023-51638

27
FAUCET Score

CVE-2023-51638 is a critical authentication bypass vulnerability affecting alltena Allegra, stemming from hardcoded database credentials. This flaw allows unauthenticated remote attackers to completely bypass authentication, gaining full control over the system with high impact on confidentiality, integrity, and availability (CVSS 9.8). While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there's minimal community discussion, the inherent severity of this vulnerability warrants immediate attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.5.1CPE matchmatch criteria
cpe:2.3:a:alltena:allegra:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.32%
Probability of exploitation in next 30 days
EPSS Percentile
67.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0132 is in the 54th percentile among its peer group of 36,862 CVEs.

Social Chatter

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

Remediation records are not available for this CVE.

References

trackplus.com / en/service/release-notes-reader/7-5-1-release-notes-2.html
Release Notes
zerodayinitiative.com / advisories/ZDI-24-111
Third Party Advisory