CVE-2026-5228 PUBLISHED

Improper Access Control in Kurt Software Studio's WriteUp Mobile App

Assigner: TR-CERT
Reserved: 31.03.2026 Published: 04.06.2026 Updated: 04.06.2026

Improper Access Control, Missing Authorization vulnerability in Kurt Software Studio WriteUp Mobile App allows Accessing Functionality Not Properly Constrained by ACLs.

This issue affects WriteUp Mobile App: from 1.3.0 through 04062026.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Kurt Software Studio
Product	WriteUp Mobile App
Versions	Default: unknown affected from 1.3.0 to 04062026 (incl.)

Credits

Hamza YEŞİLMEN finder

References

https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0310

Problem Types

CWE-284 Improper Access Control CWE
CWE-862 Missing Authorization CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs