VulnerabilityAnalyzed
CVE-2025-64011
Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint.
MEDIUM 4.3EPSS 0.27%
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
Description
Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint. Any authenticated user can access previews of arbitrary files belonging to other users by manipulating the fileId parameter. This allows unauthorized disclosure of sensitive data, such as text files or images, without prior sharing permissions.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.27% probability · 20th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-639
- Affected
- nextcloud/nextcloud server
- Source
- cve@mitre.org
References
- https://drive.google.com/file/d/1eD3PN-u1caZYgGH96XHmJ7h_OBXEAHW4/view?usp=sharingExploit
- https://gist.github.com/tarekramm/586dfe2d113fedfee6d71182570fc090Exploit, Third Party Advisory
- https://nextcloud.comProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.