TI-2023-04544 Aliases CVE-2023-4934 GHSA-4cxm-9rxq-69rw

IDOR in Usta AYBS

MEDIUM 42CWE-639Published 2023-09-27 · Updated 2026-05-21

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01194 68th percentileScored 2026-11-07

Fix Fixed AYBS (Usta): 1.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Usta	AYBS	before 1.0.3	1.0.3	Patch available	CNA

AYBS VendorUsta Affected before 1.0.3 Fixed in 1.0.3 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:usta:aybs::::::::	before 1.0.3	Vulnerable	Usta

cpe:2.3:a:usta:aybs:*:*:*:*:*:*:*:* Versions before 1.0.3 Vulnerable ·Usta

Remediation

Fix · CNA AYBS (Usta) Fixed in 1.0.3

Timeline

2026-10-02 Threatist record created from CVE-2023-4934
2026-10-03 Alias added: GHSA-4cxm-9rxq-69rw

References

Advisory 1

https://www.usom.gov.tr/bildirim/tr-23-0558

Other 1

https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0558

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences