CVE-2026-48799
HIGH
NVD
CVSS Score
7.7
Severity
HIGH
Published
Jul 15, 2026
Vendor
unknown
Description
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.