CVE-2026-48799 Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook
Attackers can grant lifetime PRO subscriptions to arbitrary organizations by bypassing payment verification in the Nowpayments webhook integration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-48799?
CVE-2026-48799 is a high-severity vulnerability in gitroomhq postiz-app, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-48799?
How do I fix CVE-2026-48799?
No fix has been published for CVE-2026-48799 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-48799 being exploited?
There is no known exploitation of CVE-2026-48799 in the wild and no public exploit code.
Sources
Also known as GHSA-j7rp-5mgj-qgg9.