title: IDOR Vulnerability in Nextcloud Mail
description: Nextcloud Mail is an email app for the Nextcloud home server platform. Prior to versions 2.2.1, 1.14.5, 1.12.9, and 1.11.8, an attacker can access the mail box by ID getting the subjects and the first characters of the emails. Users should upgrade to Mail 2.2.1 for Nextcloud 25, Mail 1.14.5 for Nextcloud 22-24, Mail 1.12.9 for Nextcloud 21, or Mail 1.11.8 for Nextcloud 20 to receive a patch. No known workarounds are available.
problem types: CWE-639: Authorization Bypass Through User-Controlled Key
affected:
{
vendor: nextcloud
product: security-advisories
versions:
version: < 1.11.8, status: affected
version: >= 1.12.0, < 1.12.9, status: affected
version: >= 1.13.0, < 1.14.5, status: affected
version: >= 2.0.0, < 2.2.1, status: affected
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 4.1
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: LOW
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
version: 3.1
]