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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m45f-r5gh-h6cx
Patch x_refsource_misc
https://github.com/nextcloud/mail/pull/7740
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1784681
Scores
CVSS v3
4.1
EPSS
0.0034
EPSS Percentile
56.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-639
Status
published
Products (1)
nextcloud/mail
< 1.11.8
Published
Feb 13, 2023
Tracked Since
Feb 18, 2026