CVE-2023-28847

low-risk
Published 2023-04-25

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.

Do I need to act?

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0.68% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.1/10 Low
NETWORK / HIGH complexity

Affected Products (2)

Affected Vendors

Nextcloud

References (6)

Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r5wf-x...
Issue Tracking https://github.com/nextcloud/server/pull/35057
Exploit https://hackerone.com/reports/1894653
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r5wf-x...
Issue Tracking https://github.com/nextcloud/server/pull/35057
Exploit https://hackerone.com/reports/1894653
20
/ 100
low-risk
Severity 11/34 · Low
Exploitability 2/34 · Minimal
Exposure 7/34 · Low