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CVE-2026-48799
7.7 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Changed (C)
- Confidentiality (C): None (N)
- Integrity (I): High (H)
- Availability (A): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): None (N)
- Modified Scope (MS): Changed (C)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): None (N)
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Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook
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.
References
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https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-j7rp-5mgj-qgg9 x_refsource_CONFIRM
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https://gadvisory.org/advisories/PSA-2026-Q3TCPK x_refsource_MISC
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https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.8 x_refsource_MISC
Affected products
postiz-app
- ==< 2.21.8