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CVE-2026-18756

🗓️ 19 Aug 2026 14:46:25Reported by Fluid AttacksType 
cve
 cve
🔗 web.nvd.nist.gov👁 50 Views🌐 WEB

Reflected XSS in HumHub 1.18.4 via options query-string parameter in space membership-request form.

Related
Detection
Affected
Refs
Paths
Vulners
CNA
Node
humhubhumhubMatch1.18.4
[
  {
    "defaultStatus": "unaffected",
    "platforms": [
      "Windows",
      "MacOS",
      "Linux"
    ],
    "product": "HumHub",
    "repo": "https://github.com/humhub/humhub",
    "vendor": "HumHub",
    "versions": [
      {
        "status": "affected",
        "version": "1.18.4"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
optionsquery paramspace/membership/request-membership-formReflected cross-site scripting in HumHub Community Edition 1.18.4 via options query parameter in the membership request form, enabling attacker-controlled JavaScript to be returned and executed.CWE-79

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28 Aug 2026 15:31Current
4.9Medium risk
Vulners AI Score4.9
CVSS 47.2
EPSS0.00467
50