CVE-2026-42556
| 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.
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| Publication Date |
May 9, 2026, 8:16 a.m. |
| Registration Date |
May 10, 2026, 4:10 a.m. |
| Last Update |
May 9, 2026, 8:16 a.m. |
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CVSS3.1 : HIGH
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| スコア |
8.9
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| Vector |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
低 |
| 利用者の関与(UI) |
要 |
| 影響の想定範囲(S) |
変更あり |
| 機密性への影響(C) |
高 |
| 完全性への影響(I) |
高 |
| 可用性への影響(A) |
低 |
Related information, measures and tools
Common Vulnerabilities List