CVE-2026-48799CWE-345CWE-639

Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook

High · published July 15, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
11.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00218 · 11.6th percentile
Weaknesses
CWE-345 · Insufficient Verification of Data Authenticity; CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-07-15T16:11Z
EPSS history
Timeline
  • 15 JUL 16:11Z
    Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook
    cvelistv5