CVE-2026-48799

gitroomhq postiz-appVulnerabilityCVSS 7.7

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.

No public exploitation has been reported so far. No distribution fix is listed yet; apply vendor mitigations and monitor.

Recommended action: Track your distribution's security tracker and apply the fix as soon as it ships.

CVE-2026-48799 gitroomhq postiz-app Vulnerability

Severity metrics

CVSS 3.1 : 7.7 HIGH

Attack vectorNetwork (remote)

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeChanged

Confidentiality impactNone

Integrity impactHigh

Availability impactNone

Vector: AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Affected & fixed versions by distribution

Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.

No affected package in the tracked watchlist yet (Debian, Ubuntu, Arch, SUSE, Red Hat...). Triage may still be pending.

Sources

Advisory NVD CVE.org

Published 2026-07-15 · updated 2026-07-26 · source: NVD