CVE-2023-25159: nextcloud nextcloud_server Improper Access Control
Vulnerability summary
CVE-2023-25159 is a medium (CVSS 5.3) Improper Access Control vulnerability in nextcloud nextcloud_server. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.1% of scored vulnerabilities.
Timeline
- 13-02-2023PublishedVulnerability first disclosed.
- 10-03-2025Last modifiedVulnerability information updated.
Description
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform, and Nextcloud Office is a document collaboration app for the same platform. Nextcloud Server 24.0.x prior to 24.0.8 and 25.0.x prior to 25.0.1, Nextcloud Enterprise Server 24.0.x prior to 24.0.8 and 25.0.x prior to 25.0.1, and Nextcloud Office (Richdocuments) App 6.x prior to 6.3.1 and 7.x prior to 7.0.1 have previews accessible without a watermark. The download should be hidden and the watermark should get applied. This issue is fixed in Nextcloud Server 25.0.1 and 24.0.8, Nextcloud Enterprise Server 25.0.1 and 24.0.8, and Nextcloud Office (Richdocuments) App 7.0.1 (for 25) and 6.3.1 (for 24). No known workarounds are available.
CVSS metrics
2 scores · 2 sources · 1 version- CVE.orgCNA2.3LowCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:NDiffers
EPSS trend
Probability
0.46%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
0.00 pp
From 0.46% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Nextcloud3 products
- nextcloud_serverEOL≥ 24.0.4, ≤ 24.0.8 | 24.0.2 | 25.0.0
- richdocuments≥ 6.0.0, < 6.3.1 | 7.0.0
- security-advisories≥ 24.0.4, < 24.0.8 | = 25.0.0 | ≥ 6.0.0, < 6.3.1 | = 7.0.0
1 vendor · 3 products
References
4 links- github.com/nextcloud/security-advisories/security/advisories/GHSA-92g2-h5jv-jjmgX Refsource CONFIRMVendor Advisory