Owncloud CVEs and Security Vulnerabilities

CVE-2026-84473

Authentication Bypass / Missing Brute-Force Protection in remote.php/webdav/ in ownCloud ownCloud server 10.16.3 allows an unauthenticated remote attacker to perform unlimited online password guessing against WebDAV accounts via repeated HTTP Basic Authentication requests to the WebDAV endpoint.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Vendors

Kiteworks

Products

Owncloud

CVE-2023-7273

Cross Site Request Forgery in Kiteworks OwnCloud

Cross site request forgery in Kiteworks OwnCloud allows an unauthenticated attacker to forge requests. If a request has no Authorization header, it is created with an empty string as value by a rewrite rule. The CSRF check is done by comparing the header value to null, meaning that the existing CSRF check is bypassed in this case. An attacker can, for example, create a new administrator account if the request is executed in the browser of an authenticated victim.

CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed