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CVE-2026-42556

🗓️ 08 May 2026 22:28:33Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 30 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
osv
OSV
CVE-2026-42556 Postiz stored XSS in public preview page
8 May 202622:28
osv
ptsecurity
Positive Technologies
PT-2026-39216
8 May 202600:00
ptsecurity
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
Rows per page
NVD
Vulners
Node
gitroompostizMatch2.21.6
[
  {
    "vendor": "gitroomhq",
    "product": "postiz-app",
    "versions": [
      {
        "version": ">= 2.21.6, < 2.21.7",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
sharepath and query param/p/<postId>Authenticated user can tamper their save request to store arbitrary HTML in post content, which is rendered via dangerouslySetInnerHTML on the preview page /p/<postId>?share=trueCWE-79

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24 Jul 2026 21:10Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.18.9 - 9
EPSS0.00258
SSVC
30