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CVE

CVE-2023-32320

Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform. When multiple requests are

Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform. When multiple requests are sent in parallel, all of them were executed even if the amount of faulty requests succeeded the limit by the time the response was sent to the client. This allowed someone to send as many requests the server could handle in parallel to bruteforce protected details instead of the configured limit, default 8.

Nextcloud Server versions 25.0.7 and 26.0.2 and Nextcloud Enterprise Server versions 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7 and 26.0.2 contain patches for this issue.

HIGH · CVSS 8.7 EPSS 0.00518
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-307Improper Restriction of Excessive Authentication Attempts
▤

Affected Products & Versions

6
nextcloud server>= 21.0.0 and < 21.0.9.12
nextcloud server>= 22.0.0 and < 22.2.10.12
nextcloud server>= 23.0.0 and < 23.0.12.7
nextcloud server>= 24.0.0 and < 24.0.12.2
nextcloud server>= 25.0.0 and < 25.0.7
nextcloud server>= 26.0.0 and < 26.0.2
▣

Scoring & Timeline

8.7
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Jun 2023 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qphh-6xh7-vffgPatchVendor Advisory
https://github.com/nextcloud/server/pull/38274Patch
https://hackerone.com/reports/1918525Permissions Required
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