Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://gadvisory.org/advisories/PSA-2026-Q3TCPK
- https://github.com/gitroomhq/postiz-app/commit/23696d2973510ae1f3f48bfa41a6bfbbf
- https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.8
- https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-j7rp-5mgj-qgg9
FAQ
What is CVE-2026-48799?
CVE-2026-48799 is a vulnerability with a CVSS score of 7.7 (HIGH). 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...
How severe is CVE-2026-48799?
CVE-2026-48799 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48799?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.