Auth bypass in Nextcloud Mail
CVE-2023-25160
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Nextcloud Mail
- Nextcloud Security-Advisories — versions < 1.11.8, >= 1.12.0, < 1.12.9, >= 1.13.0, < 1.14.5
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-m45f-r5gh-h6cx (Vendor Advisory)
- github.com/nextcloud/mail/pull/7740 (Patch)
- hackerone.com/reports/1784681 (Permissions Required, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-25160?
- CVE-2023-25160 is a medium-severity vulnerability in Nextcloud Mail, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.1/10. Published 2023-02-13.
- How severe is CVE-2023-25160?
- Medium severity. CVSS v3 base score is 4.1 out of 10.