CVE-2025-59716: guests Information Disclosure — Exploit

Description

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.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-200 CWE-200

CWE-203 CWE-203

Affected Products

Vendor	Product	Versions
owncloud	guests	< 0.12.4

References

Exploits

https://gist.github.com/thesmartshadow/64ae0449e909174d0479a4f23657147f

Other References

https://github.com/owncloud/guests https://marketplace.owncloud.com/apps/guests https://yeswehack.com/reports/411806

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-59716? +

CVE-2025-59716 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-59716? +

CVE-2025-59716 affects products from owncloud, specifically: guests. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59716? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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