Auth bypass in Owncloud Server
CVE-2023-49105
An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.
Vulnerability class: Broken Authentication
EPSS: 0.111 (95.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Owncloud Owncloud_server
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product)
- cve@mitre.org (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-49105?
- CVE-2023-49105 is a critical-severity vulnerability in Owncloud Server, classified under Improper Authentication. CVSS score: 9.8/10. Published 2023-11-21.
- How severe is CVE-2023-49105?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2023-49105 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.