What’s Vulnerable › Vulnerabilities

CVE-2023-49104

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-21 · updated 2026-06-17
• Weakness: CWE-601

Description

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

How to fix

Upgrade to a fixed version: owncloud Oauth2 0.6.1. Check the vendor advisory for mitigations.

References

• https://owncloud.com/security-advisories/subdomain-validation-bypass/
• https://owncloud.org/security
• https://owncloud.com/security-advisories/subdomain-validation-bypass/
• https://owncloud.org/security

Get alerted when CVE-2023-49104 or the next vulnerability affects your stack