Information disclosure in Owncloud Guests
CVE-2025-59716
ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the /apps/guests/register/{email}/{token} endpoint. Because of insufficient validation of the supplied token in showPasswordForm, the server responds differently when an e-mail address corresponds to a valid pending guest user rather than a non-existent user.
Vulnerability class: Information Disclosure
EPSS: 0.009 (56.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Owncloud Guests
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Product)
- cve@mitre.org (Permissions Required)
- cve@mitre.org (Product)
- cve@mitre.org (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-59716?
- CVE-2025-59716 is a medium-severity vulnerability in Owncloud Guests, classified under Information Disclosure. CVSS score: 5.3/10. Published 2025-11-05.
- How severe is CVE-2025-59716?
- Medium severity. CVSS v3 base score is 5.3 out of 10.