CVE-2023-49105: owncloud owncloud_server

CVSS 9.8 (critical) · listed as exploited by CISA since 2026-08-27 · published 2023-11-21

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.

Affected products (NVD): owncloud owncloud_server

Fixed in (NVD): 10.13.1

Weakness: CWE-287

Source: NVD CVE-2023-49105

References

• https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/
• https://owncloud.org/security
• https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/
• https://owncloud.org/security
• https://hunt.io/blog/chinese-speaking-operator-philippine-nuclear-naval-contractor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-49105

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