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TI-2023-11090 Aliases CVE-2023-25820

Nextcloud Server and Enterprise Server missing brute force protection on password confirmation modal

Priority LOW 34CWE-307Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-307.

Summary

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform, and Nextcloud Enterprise Server is the enterprise version of the file server software. In Nextcloud Server versions 25.0.x prior to 25.0.5 and versions 24.0.x prior to 24.0.10 as well as Nextcloud Enterprise Server versions 25.0.x prior to 25.0.4, 24.0.x prior to 24.0.10, 23.0.x prior to 23.0.12.5, 22.x prior to 22.2.0.10, and 21.x prior to 21.0.9.10, when an attacker gets access to an already logged in user session they can then brute force the password on the confirmation endpoint. Nextcloud Server should upgraded to 24.0.10 or 25.0.4 and Nextcloud Enterprise Server should upgraded to 21.0.9.10, 22.2.10.10, 23.0.12.5, 24.0.10, or 25.0.4 to receive a patch. No known workarounds are available.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00235 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisoriesNextcloud Server >= 24.0.0, < 24.0.10; Nextcloud Server >= 25.0.0, < 25.0.4; Nextcloud Enterprise Server >= 25.0.0, < 25.0.4; Nextcloud Enterprise Server >= 24.0.0, < 24.0.10; Nextcloud Enterprise Server >= 23.0.0, < 23.0.12.5; Nextcloud Enterprise Server >= 22.0.0, < 22.2.10.10; Nextcloud Enterprise Server >= 21.0.0, < 21.0.9.10—No fix listedCNA
  • security-advisories Vendornextcloud Affected Nextcloud Server >= 24.0.0, < 24.0.10; Nextcloud Server >= 25.0.0, < 25.0.4; Nextcloud Enterprise Server >= 25.0.0, < 25.0.4; Nextcloud Enterprise Server >= 24.0.0, < 24.0.10; Nextcloud Enterprise Server >= 23.0.0, < 23.0.12.5; Nextcloud Enterprise Server >= 22.0.0, < 22.2.10.10; Nextcloud Enterprise Server >= 21.0.0, < 21.0.9.10 Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*21.0.0 to before 21.0.9; 22.2.0 to before 22.2.10.10; 23.0.0 to before 23.0.12.5Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*24.0.0 to before 24.0.10Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*24.0.0 to before 24.0.10Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*25.0.0 to before 25.0.4Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*25.0.0 to before 25.0.4Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* Versions 21.0.0 to before 21.0.9; 22.2.0 to before 22.2.10.10; 23.0.0 to before 23.0.12.5 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* Versions 24.0.0 to before 24.0.10 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* Versions 24.0.0 to before 24.0.10 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* Versions 25.0.0 to before 25.0.4 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* Versions 25.0.0 to before 25.0.4 Vulnerable ·nextcloud

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-25820

References

Patch 1

Advisory 2

  • TI-2023-20855 Users can delete external storage mount points CVSS 3.1HIGH 7.7
  • TI-2023-11091 Nextcloud download permissions can be changed by resharer CVSS 3.1HIGH 7.5
  • TI-2023-10624 Nextcloud Server vulnerable to SSRF via filter bypass due to lax checking on IPs CVSS 3.1MEDIUM 5.3
  • TI-2025-37238 Cross-site scripting in Nextcloud CVSS 3.1MEDIUM 6.4
  • TI-2023-11086 nextcloud vulnerable to Uncontrolled Resource Consumption CVSS 3.1MEDIUM 6.5
  • TI-2022-18738 Exception logging in Sharepoint app reveals clear-text connection details CVSS 3.1MEDIUM 6.5
See all 188 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences