CVE-2026-42556

Postiz (AI social media tool) is affected from v2.21.6 up to, but not including, v2.21.7. An authenticated user who can create posts can tamper their own save request to store arbitrary HTML in post content. When a user visits the public preview link /p/?share=true, the preview renders the stored...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

Gitroom Postiz 安全漏洞

Gitroom Postiz is an open-source social media scheduling tool developed by Gitroom. Versions of Gitroom Postiz prior to 2.21.6 contained security vulnerabilities. These vulnerabilities were caused by a bypass in file upload validation, which could lead to storage-side cross-site scripting attacks...

WordPress plugin Bit Form – Contact Form Plugin 安全漏洞

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