CVE-2026-42556: 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…

PriorityP353critical9CVSS 3.1

AVNACLPRLUIRSCCHIHAH

EPSS

0.26%

17.1th percentile

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/?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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
gitroom	postiz	—	—
gitroomhq	postiz-app	—	—

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