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CVE-2023-30539— Users can set up workflows using restricted and invisible system tags in Nextcloud

Quick assessment

Affected
nextcloud security-advisories
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud存在访问控制错误漏洞，该漏洞源于当存在基于系统标签的文件访问控制或文件保留规则时，可用于限制其他人的访问或能够授予他们访问权限。

CVSS 6.5 · Medium EPSS 0.63% · P48
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I. Basic Information for CVE-2023-30539

Vulnerability Information
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Vulnerability Title
Users can set up workflows using restricted and invisible system tags in Nextcloud
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud is a personal home server system. Depending on the set up tags and other workflows this issue can be used to limit access of others or being able to grant them access when there are system tag based files access control or files retention rules. It is recommended that the Nextcloud Server is upgraded to 24.0.11 or 25.0.5, the Nextcloud Enterprise Server to 21.0.9.11, 22.2.10.11, 23.0.12.6, 24.0.11 or 25.0.5, and the Nextcloud Files automated tagging app to 1.11.1, 1.12.1, 1.13.1, 1.14.2, 1.15.3 or 1.16.1. Users unable to upgrade should disable all workflow related apps. Users are advised to upgrade.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud存在访问控制错误漏洞，该漏洞源于当存在基于系统标签的文件访问控制或文件保留规则时，可用于限制其他人的访问或能够授予他们访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nextcloud security-advisories Nextcloud Server: < 24.0.11 -

II. Public POCs for CVE-2023-30539

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III. Intelligence Information for CVE-2023-30539

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Patches & Fixes for CVE-2023-30539 (2)

Vendor Advisories for CVE-2023-30539 (1)

Other References for CVE-2023-30539 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-284

V. Comments for CVE-2023-30539

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