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VulnerabilityPublished

CVE-2025-59716: ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the

Source GCVE Database

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Authoritative record:CVE-2025-59716· Medium 5.3

Not known to be exploited · public detection template (Nuclei) · CVSS 5.3 Medium : upgrade to 0.12.5 when convenient.

Data as of 4 Nov 2026, 17:16 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.15.3
Patch
Available – fixed in 0.12.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Nov 2025

  2. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.

What to do

Upgrade owncloud/guests to 0.12.5.

Affected software

ProductAffectedFixed in
GitHubowncloud/guestspkg:github/owncloud/guestsOther threatsAffected
  • <0.12.5
Fixed in
  • 0.12.5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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.

References

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