PT-2023-8884 · Nextcloud+2 · Nextcloud Enterprise Server+3

Nvz0X + 1 · Published 2023-11-21 · Updated 2025-01-24 · CVE-2023-48303

Positive Technologies (AI Summary)

CVSS v2.0

3.3

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions 25.0.0 through 25.0.10 Nextcloud Server versions 26.0.0 through 26.0.5 Nextcloud Server versions 27.0.0 through 27.0.1 Nextcloud Enterprise Server versions 25.0.0 through 25.0.10 Nextcloud Enterprise Server versions 26.0.0 through 26.0.5 Nextcloud Enterprise Server versions 27.0.0 through 27.0.1

Description The issue is related to the ability of admins to change authentication details of user-configured external storage in Nextcloud Server and Nextcloud Enterprise Server. This could allow a remote attacker to bypass existing access restriction policies.

Recommendations For Nextcloud Server versions 25.0.0 through 25.0.10, update to version 25.0.11 or later. For Nextcloud Server versions 26.0.0 through 26.0.5, update to version 26.0.6 or later. For Nextcloud Server versions 27.0.0 through 27.0.1, update to version 27.1.0 or later. For Nextcloud Enterprise Server versions 25.0.0 through 25.0.10, update to version 25.0.11 or later. For Nextcloud Enterprise Server versions 26.0.0 through 26.0.5, update to version 26.0.6 or later. For Nextcloud Enterprise Server versions 27.0.0 through 27.0.1, update to version 27.1.0 or later.

Exploit

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

ALT-PU-2023-7785

ALT-PU-2023-7786

ALT-PU-2024-1230

ALT-PU-2025-1855

BDU:2024-02547

CVE-2023-48303

GHSA-2448-44RP-C7HH

Affected Products

Alt Linux

Nextcloud Enterprise Server

Nextcloud Server

Red Os

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48303.json · Exploit
• https://github.com/nextcloud/server/pull/39895 · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2448-44rp-c7hh · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-48303 · Security Note
• https://osv.dev/vulnerability/CVE-2023-48303 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-02547 · Security Note
• https://hackerone.com/reports/2107934 · Note
• https://t.me/cvenotify/61780 · Telegram Post
• https://redos.red-soft.ru/support/secure · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-nextcloud-cve-2023-48301-cve-2023-48302 · Note