CVE-2023-28847: nextcloud nextcloud_server
Vulnerability summary
CVE-2023-28847 is a high (CVSS 7.5) vulnerability in nextcloud nextcloud_server. EPSS estimates a 0.77% chance of exploitation in the next 30 days, higher than 54.9% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 25-04-2023PublishedVulnerability first disclosed.
- 03-02-2025Last modifiedVulnerability information updated.
Description
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. In Nextcloud Server 24.0.0 prior to 24.0.11 and 25.0.0 prior to 25.0.5; as well as Nextcloud Server Enterprise 23.0.0 prior to 23.0.12.6, 24.0.0 prior to 24.0.11, and 25.0.0 prior to 25.0.5; an attacker is not restricted in verifying passwords of share links so they can just start brute forcing the password. Nextcloud Server 24.0.11 and 25.0.5 and Nextcloud Enterprise Server 23.0.12.6, 24.0.11, and 25.0.5 contain a fix for this issue. No known workarounds are available.
CVSS metrics
2 scores · 2 sources · 1 version- CVE.orgCNA3.1LowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:NDiffers
EPSS trend
Probability
0.77%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
0.00 pp
From 0.77% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (hackerone.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Nextcloud2 products
- nextcloud_server≥ 23.0.0, < 23.0.12.6 | ≥ 24.0.0, < 24.0.11 | ≥ 25.0.0, < 25.0.5
- security-advisories≥ 23.0.0, < 23.0.12.6 | ≥ 24.0.0, < 24.0.11 | ≥ 25.0.0, < 25.0.5
1 vendor · 2 products
References
3 links- github.com/nextcloud/security-advisories/security/advisories/GHSA-r5wf-xj97-3w7wX Refsource CONFIRMVendor Advisory