PT-2023-27175 · Nextcloud+1 · Nextcloud Server+1

Rullzer · Published 2023-08-10 · Updated 2025-01-24 · CVE-2023-39961

Positive Technologies (AI Summary)

CVSS v3.1

3.5

Low

Base vector

AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions 24.0.4 through 25.0.8 Nextcloud Server versions 26.0.0 through 26.0.3 Nextcloud Server versions 27.0.0 through 27.0.0

Description Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. When a folder with images or an image was shared without download permissions, the user could add the image inline into a text file and download it.

Recommendations For Nextcloud Server versions 24.0.4 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 Server versions 27.0.0 through 27.0.0, update to version 27.0.1 or later.

Exploit

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

ALT-PU-2023-7785

ALT-PU-2025-1855

CVE-2023-39961

GHSA-QHGM-W4GX-GVGP

Affected Products

Alt Linux

Nextcloud Server

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39961.json · Exploit
• https://github.com/nextcloud/text/pull/4481 · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-39961 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-39961 · Security Note
• https://t.me/cvenotify/56639 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1689739658610028544 · Twitter Post
• https://hackerone.com/reports/1965156 · Note