CVE-2025-59716

5.3 mediumEPSS 1.0%

Medium (5.3) in owncloud guests. EPSS 1.0% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-31)
CWEs: CWE-200, CWE-203
Published: 2025-11-05
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

owncloud:guests

References

https://gist.github.com/thesmartshadow/64ae0449e909174d0479a4f23657147f
https://github.com/owncloud/guests
https://marketplace.owncloud.com/apps/guests
https://yeswehack.com/reports/411806

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