Security Advisory

CVE-2026-42556

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-08 22:28:33

Last updated 2026-05-13 17:46:47

Assigner GitHub_M

CVSS score 8.9

State PUBLISHED

Description

Postiz is an AI social media scheduling tool. From version 2.21.6 to before version 2.21.7, any authenticated user who can create a post can store arbitrary HTML in post content by tampering their own save request and send the public preview link /p/<postId>?share=true to another user. The preview page renders that stored HTML with dangerouslySetInnerHTML on the main application origin. This issue has been patched in version 2.21.7.

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