CVEvulnerability

CVE-2026-42556

9.0 CRITICAL Published 2026-05-08 Modified 2026-07-24 Official page ↗
Status
Analyzed
Published
2026-05-08
Last modified
2026-07-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.9 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
CVSS 3.1 ([email protected])
9.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Weaknesses
CWE-79

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.

Affected configurations

• gitroom postiz 2.21.6

Related

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References