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.

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

42.92% chance of exploitation in the next 30 days, 99th percentile

CISA KEV

added 2026-08-27

Nuclei

critical · CWE-287

Published

2023-11-21

Updated

2026-08-28

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/code/cves/2023/CVE-2023-49105.yaml

Security advisories

• https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signe…
• https://hunt.io/blog/chinese-speaking-operator-philippine-nuclear-naval-contractor
• https://owncloud.org/security

References

• CVE Record
• NVD entry