Fiche vulnérabilité
CVE-2026-42556 : faille critique gitroom postiz (CVSS 9.0)
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.
En bref
- Sévérité
- Critique (CVSS 9.0)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 8 mai 2026
- Dernière mise à jour
- 24 juil. 2026
Produits concernés
- gitroom postiz