CVE-2026-48799

Postiz is an AI social media scheduling tool. Prior to 2.21.8, Postiz fails to verify Nowpayments IPN callback authenticity against the payment provider shared secret and reads the target subscription identifier from the untrusted request body, allowing a low-privileged account to grant arbitrary organizations lifetime PRO subscriptions without payment. This issue is fixed in version 2.21.8.

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://gadvisory.org/advisories/PSA-2026-Q3TCPK
https://github.com/gitroomhq/postiz-app/commit/23696d2973510ae1f3f48bfa41a6bfbbf9827b05
https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.8
https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-j7rp-5mgj-qgg9

Configurations

No configuration.

History

24 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Postiz es una herramienta de programación de redes sociales con IA. Previo a la 2.21.8, Postiz no verifica la autenticidad de las devoluciones de llamada IPN de Nowpayments contra el secreto compartido del proveedor de pagos y lee el identificador de suscripción objetivo del cuerpo de la solicitud no confiable, permitiendo que una cuenta con pocos privilegios otorgue a organizaciones arbitrarias suscripciones PRO de por vida sin pago. Este problema está solucionado en la versión 2.21.8.

Information

Published : 2026-07-15 17:16

Updated : 2026-10-24 21:10

NVD link : CVE-2026-48799

Mitre link : CVE-2026-48799

CVE.ORG link : CVE-2026-48799

JSON object : View

Products Affected

No product.

CWE

CWE-345

Insufficient Verification of Data Authenticity

CWE-639

Authorization Bypass Through User-Controlled Key

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