PT-2023-6219 · Nextcloud+2 · Nextcloud Enterprise Server+3

Drinndrecaj · Published 2023-10-13 · Updated 2025-01-24 · CVE-2023-39960

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:N

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions 25.0.0 through 25.0.8 Nextcloud Server versions 26.0.0 through 26.0.3 Nextcloud Enterprise Server versions 22.0.0 through 22.2.10.13 Nextcloud Enterprise Server versions 23.0.0 through 23.0.12.8 Nextcloud Enterprise Server versions 24.0.0 through 24.0.12.4

Description The issue is related to insufficient restriction of authentication attempts in the WebDAV API implementation of Nextcloud cloud software, allowing a remote attacker to gain access to confidential information by brute forcing passwords on the WebDAV API.

Recommendations For Nextcloud Server versions 25.0.0 through 25.0.8, update to version 25.0.9 or later. For Nextcloud Server versions 26.0.0 through 26.0.3, update to version 26.0.4 or later. For Nextcloud Enterprise Server versions 22.0.0 through 22.2.10.13, update to version 22.2.10.14 or later. For Nextcloud Enterprise Server versions 23.0.0 through 23.0.12.8, update to version 23.0.12.9 or later. For Nextcloud Enterprise Server versions 24.0.0 through 24.0.12.4, update to version 24.0.12.5 or later.

Exploit

Fix

Improper Restriction of Excessive Authentication Attempts

Weakness Enumeration

CWE-307

Related Identifiers

ALT-PU-2023-7785

ALT-PU-2025-1855

BDU:2023-06928

CVE-2023-39960

GHSA-2HRC-5FGP-C9C9

Affected Products

Alt Linux

Nextcloud Enterprise Server

Nextcloud Server

Red Os

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39960.json · Exploit
• https://github.com/nextcloud/server/pull/38046 · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2hrc-5fgp-c9c9 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-39960 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-39960 · Security Note
• https://bdu.fstec.ru/vul/2023-06928 · Security Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/uyazvimost-nextcloud-cve-2023-39960 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/uyazvimost-nextcloud-server-cve-2023-39960 · Note
• https://hackerone.com/reports/1924212 · Note
• https://t.me/cibsecurity/72235 · Telegram Post