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Vulnerability record · CVE-2023-53951 · published 19 December 2025

CVE-2023-53951: Improper verification of cryptographic signature vulnerability

Ever Gauzy v0.281.9 contains a JWT authentication vulnerability that allows attackers to exploit weak HMAC secret key implementation. Attackers can leverage the exposed JWT token to authenticate and gain unauthorized access with administrative permissions.

9.3 CVSS 4.0 Critical EPSS 0.36% · top 72.9% CWE-347 · Improper verification of cryptographic signature Deferred
9.3CVSS 4.0 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

Ever Gauzy v0.281.9 contains a JWT authentication vulnerability that allows attackers to exploit weak HMAC secret key implementation. Attackers can leverage the exposed JWT token to authenticate and gain unauthorized access with administrative permissions.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/ever-co/ever-gauzy
https://www.exploit-db.com/exploits/51354
https://www.vulncheck.com/advisories/ever-gauzy-jwt-authentication-weakness-via-hmac-secret

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-53951), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.