CVE-2026-18430

UNKNOWN 0.0

HumHub 1.18.4 - Stored XSS in comment-deletion notifications through unescaped administrator reason

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

HumHub 1.18.4 contains a stored cross-site scripting vulnerability in the comment-deletion notification flow. A Space administrator can delete another user's comment, choose to notify the original author, and place HTML/JavaScript in the deletion reason.

CWE	CWE-79
Vendor	humhub
Product	humhub
Published	Aug 19, 2026

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Affected Versions

HumHub / HumHub

1.18.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

fluidattacks.com: https://fluidattacks.com/es/advisories/personajes github.com: https://github.com/humhub/humhub/pull/8365 github.com: https://github.com/humhub/humhub

Credits

Miguel Gomez Fluid Attacks' AI SAST Scanner