CVE-2025-59716

EUVD-2025-37881
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA-ADPADP
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 15%
Affected Products (NVD)
VendorProductVersion
owncloudguests
𝑥
≤ 0.12.4
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://gist.github.com/thesmartshadow/64ae0449e909174d0479a4f23657147f
https://github.com/owncloud/guests
https://marketplace.owncloud.com/apps/guests
https://yeswehack.com/reports/411806