What is CVE-2023-4934?

CVE-2023-4934 is a high-severity vulnerability in Usta Aybs, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2023-09-27.

How severe is CVE-2023-4934?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Usta Aybs

CVE-2023-4934

Authorization Bypass Through User-Controlled Key vulnerability in Usta AYBS allows Authentication Abuse, Authentication Bypass. This issue affects AYBS: before 1.0.3.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2023-09-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.6th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.012 · change: +0.002

Affected products

Usta Aybs — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

www.usom.gov.tr/bildirim/tr-23-0558 (Third Party Advisory, government-resource, broken-link)
siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0558 (government-resource)

Frequently asked questions

What is CVE-2023-4934?: CVE-2023-4934 is a high-severity vulnerability in Usta Aybs, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2023-09-27.
How severe is CVE-2023-4934?: High severity. CVSS v3 base score is 8.8 out of 10.