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Nextcloud: Mail stored HTML injection in subject text

🗓️ 24 Sep 2025 17:36:22Reported by se1enType 
hackerone
 hackerone
🔗 hackerone.com👁 5 Views

Nextcloud mail stored HTML injection in subject text allows arbitrary HTML in stored email subjects.

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12 Feb 2026 13:52Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.13.5 - 5.4
EPSS0.00016
SSVC
5