cvedb.io
CVE-2026-42556
HIGH · CVSS 8.9
EPSS exploitation probability: 0%
Published 2026-05-08T23:16:39.373 · Last modified 2026-06-17T10:48:01.890

Summary

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.

Affected products

gitroom — postiz

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.