CVE-2026-48799 — Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook
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 …
Published: 2026-07-15 · CVSS: 7.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7