CVE-2025-59716 json
ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the /apps/guests/register/{email}/{token} endpoint.
published 2025-11-05 12 mo ago modified 2026-11-05 4 d ago also EUVD-2025-37881
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 12 mo ago
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template ownCloud Guests - User Enumeration nuclei detection template
- gist.github.com https://gist.github.com/thesmartshadow/64ae0449e909174d0479a4f23657147f referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Classification
References
-
gist.github.com
/thesmartshadow/64ae0449e909174d0479a4f23657147f
exploit, third-party-advisory
-
github.com
/owncloud/guests
product
-
yeswehack.com
/reports/411806
permissions-required
-
marketplace.owncloud.com
/apps/guests
product
Sources
- CVE List CVE-2025-59716
- NVD CVE-2025-59716
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.