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CVE-2026-42556

🗓️ 08 May 2026 22:28:33Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 44 Views🌐 WEB

Stored XSS in Postiz public preview via tampered save request; fixed in 2.21.7.

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-42556
8 May 202622:28
–attackerkb
circl
Circl
CVE-2026-42556
8 May 202623:20
–circl
cnnvd
CNNVD
Gitroom Postiz 跨站脚本漏洞
8 May 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-42556 Postiz stored XSS in public preview page
8 May 202622:28
–cvelist
euvd
EUVD
EUVD-2026-28866
8 May 202622:28
–euvd
nvd
NVD
CVE-2026-42556
8 May 202623:16
–nvd
ptsecurity
Positive Technologies
PT-2026-39216
8 May 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-42556: Improper Neutralization of Input During Web Page Generation
8 May 202600:00
–rapid7
redhatcve
RedhatCVE
CVE-2026-42556
13 May 202620:23
–redhatcve
vulnrichment
Vulnrichment
CVE-2026-42556 Postiz stored XSS in public preview page
8 May 202622:28
–vulnrichment
NVD
Node
gitroompostizMatch2.21.6
[
  {
    "vendor": "gitroomhq",
    "product": "postiz-app",
    "versions": [
      {
        "version": ">= 2.21.6, < 2.21.7",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
post contentpath/p/<postId>?share=trueStored HTML in post content can be rendered on the public preview page via dangerouslySetInnerHTML, enabling cross-site scripting (stored XSS).CWE-79

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24 Jul 2026 21:10Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.18.9 - 9
EPSS0.00437
SSVC
44