CVE-2026-48799

HIGH7.7

Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook

Published Jul 15, 2026

Modified 1 months ago

Details

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.

References

WEB

https://gadvisory.org/advisories/PSA-2026-Q3TCPK

WEB

https://github.com/gitroomhq/postiz-app/commit/23696d2973510ae1f3f48bfa41a6bfbbf9827b05

WEB

https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.8

WEB

https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-j7rp-5mgj-qgg9

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-48799

CVSS Analysis