CVE-2025-66515 json
Nextcloud Approval app allows users to request approval for other users file
published 2025-12-05 11 mo ago modified 2026-10-15 24 d ago also EUVD-2025-201457
- cvss
- 2.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
The Nextcloud Approval app allows approval or disapproval of files in the sidebar. Prior to 1.3.1 and 2.5.0, an authenticated user listed as a requester in a workflow can set another user’s file into the “pending approval” without access to the file by using the numeric file id. This vulnerability is fixed in 1.3.1 and 2.5.0.
Patch / fix
- nextcloud approval 1.3.1, 2.5.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 2.7 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N |
Affected products
- nextcloud security-advisories
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/nextcloud/approval/pull/334
issue-tracking
-
github.com
/nextcloud/approval/commit/e30b56b7832255311ac800b7875f44866e88fff4
patch
-
github.com
/nextcloud/security-advisories/security/advisories/GHSA-q26g-fmjq-x5g5
patch, vendor-advisory
-
hackerone.com
/reports/3338748
issue-tracking, vendor-advisory
Sources
- CVE List CVE-2025-66515
- NVD CVE-2025-66515
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.