CVE Catalog

CVE-2025-59716

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
0.95%

61th percentile - higher than 61% of all known CVEs

Summary

ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the /apps/guests/register/{email}/{token} endpoint. Due to insufficient token validation in showPasswordForm, the server responds differently when an email address corresponds to a valid pending guest user versus a non-existent user.

Risk Assessment

An attacker could determine which email addresses are registered as pending guests, facilitating targeted phishing or social engineering attacks.

Recommendation

Update ownCloud Guests to version 0.12.5 or later. Also monitor for unusual requests to the guest registration endpoint.

Related vulnerabilities

Original NVD description (English source)

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 data from NVD (NIST) · CISA KEV · EPSS