PT-2025-45141 · Owncloud · Owncloud Guests

Published 2025-11-05 · Updated 2026-03-26 · CVE-2025-59716

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions ownCloud Guests versions prior to 0.12.5

Description The application allows unauthenticated user enumeration through the /apps/guests/register/{email}/{token} API endpoint. Insufficient validation of the supplied token within the showPasswordForm function causes the server to respond differently based on whether the provided email address corresponds to a valid pending guest user or a non-existent user.

Recommendations Update ownCloud Guests to version 0.12.5 or later.

Exploit

Fix

Side Channel Attack

Information Disclosure

Weakness Enumeration

CWE-203

CWE-200

Related Identifiers

CVE-2025-59716

Affected Products

Owncloud Guests

References · 9

• 🔥 https://gist.github.com/thesmartshadow/64ae0449e909174d0479a4f23657147f · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-59716 · Security Note
• https://osv.dev/vulnerability/CVE-2025-59716 · Vendor Advisory
• https://github.com/owncloud/guests · Note
• https://twitter.com/Alishmery2/status/2005881462176809289 · Twitter Post
• https://t.me/CVEtracker/36629 · Telegram Post
• https://twitter.com/pdnuclei_bot/status/2036986528103371088 · Twitter Post
• https://yeswehack.com/reports/411806 · Note
• https://marketplace.owncloud.com/apps/guests · Note