CVE-2023-49104: ownCloud OAUTH2

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered in ownCloud owncloud/oauth2 before 0.6.1, when Allow Subdomains is enabled. An attacker is able to pass in a crafted redirect-url that bypasses validation, and consequently allows an attacker to redirect callbacks to a Top Level Domain controlled by the attacker.

Affected products

• ownCloud OAUTH2: before 0.6.1 (fixed in 0.6.1)

Published 2023-11-21. Last modified 2026-06-17.