Is CVE-2026-48799 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-48799 being exploited in the wild.

How severe is CVE-2026-48799?

High severity, with a CVSS score of 7.7, published 15 July 2026.

Is there a fix for CVE-2026-48799?

A patch was published on 2026-05-22: Fix developed and released in version 2.21.8. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-48799 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-48799?

Check whether you run Gitroom Postiz at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-48799: Gitroomhq Postiz authorization bypass in Nowpayments webhook

CVE-2026-48799 · Severity: high · CVSS 7.7 · Published 2026-07-15

Postiz, an AI-powered social media scheduling tool, contains a flaw in how it handles payment notifications from the Nowpayments service. An attacker with a standard user account can bypass the payment process to grant themselves or any other organization a lifetime 'PRO' subscription for free. This vulnerability results in direct revenue loss for the service operator by allowing unauthorized access to premium features without valid transactions.

Technologies: Gitroom Postiz. Vendors: Gitroom.

Quick answers

Is CVE-2026-48799 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-48799 being exploited in the wild.
How severe is CVE-2026-48799?: High severity, with a CVSS score of 7.7, published 15 July 2026.
Which products and versions are affected?: Gitroom Postiz < 2.21.8.
Is there a fix for CVE-2026-48799?: A patch was published on 2026-05-22: Fix developed and released in version 2.21.8. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48799 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-48799?: Check whether you run Gitroom Postiz at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability exists in the Nowpayments Instant Payment Notification (IPN) handler within Postiz. The application fails to validate the authenticity of incoming webhooks against the payment provider's shared secret, instead relying on a token signed with an internal key that any authenticated user can obtain. Furthermore, the handler extracts the target subscription identifier from the untrusted request body rather than a verified token. A remote attacker with low-privileged access can exploit this to specify an arbitrary organization as the target for a subscription upgrade, effectively bypassing the payment gateway. The issue is addressed in version 2.21.8 by implementing proper signature verification and data integrity checks.

Affected products

gitroomhq postiz-app < 2.21.8

Timeline

2026-05-22: disclosed: Postiz received the advisory and verified the vulnerability.
2026-05-22: patched: Fix developed and released in version 2.21.8.
2026-05-23: advisory: GitHub Security Advisory published.
2026-07-15: advisory: NVD published the CVE record.

References

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