How severe is CVE-2025-59716?

CVE-2025-59716 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-59716 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59716?

CVE-2025-59716 affects Owncloud Guests. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59716?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-59716 have an EU (EUVD) identifier?

Yes. CVE-2025-59716 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37881.

When was CVE-2025-59716 published?

CVE-2025-59716 was published on 2025-11-05 and last updated on 2026-06-17.

CVE-2025-59716

CVE-2025-59716 is a medium-severity vulnerability in Owncloud Guests with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-37881
Weakness: CWE-200
Affected product: Owncloud Guests
Published: 2025-11-05
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-59716?: CVE-2025-59716 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-59716 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59716?: CVE-2025-59716 affects Owncloud Guests. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59716?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-59716 have an EU (EUVD) identifier?: Yes. CVE-2025-59716 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37881.
When was CVE-2025-59716 published?: CVE-2025-59716 was published on 2025-11-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:owncloud:guests:*:*:*:*:*:*:*:*

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