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CVE-2023-39961

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Date: August 10, 2023

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 24.0.4 and prior to versions 25.0.9, 26.0.4, and 27.0.1, 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. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.

Language: PHP

Severity Score

Related Resources (5)

https://hackerone.com/reports/1965156
https://nvd.nist.gov/vuln/detail/CVE-2023-39961
https://github.com/nextcloud/text/pull/4481
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp
https://www.mend.io/vulnerability-database/CVE-2023-39961

Severity Score

Weakness Type (CWE)

Improper Access Control

CWE-284

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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