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CVE-2022-41970— Nextcloud Server's disabled download shares still allow download through preview images

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 Server 24.0.7之前版本、25.0.1之前版本存在安全漏洞，该漏洞源于禁用的下载共享仍然允许通过预览图像下载。

CVSS 2.6 · Low EPSS 0.60% · P46

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2022-41970

Vulnerability Information
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Vulnerability Title
Nextcloud Server's disabled download shares still allow download through preview images
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Server is an open source personal cloud server. Prior to versions 24.0.7 and 25.0.1, disabled download shares still allow download through preview images. Images could be downloaded and previews of documents (first page) can be downloaded without being watermarked. Versions 24.0.7 and 25.0.1 contain a fix for this issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 安全漏洞
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 Server 24.0.7之前版本、25.0.1之前版本存在安全漏洞，该漏洞源于禁用的下载共享仍然允许通过预览图像下载。
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 < 24.0.7 -

II. Public POCs for CVE-2022-41970

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III. Intelligence Information for CVE-2022-41970

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Patches & Fixes for CVE-2022-41970 (1)

Vendor Advisories for CVE-2022-41970 (1)

Other References for CVE-2022-41970 (1)

Same Patch Batch · nextcloud · 2022-12-01 · 4 CVEs total

CVE-2022-41971 4.8 MEDIUM Nextcloud Talk guests can continue to receive video streams from call after being removed
CVE-2022-41968 3.5 LOW Nextcloud Server's calendar name length not validated before writing to database
CVE-2022-41969 2.4 LOW Nextcloud Server has no password length limit when creating a user as an administrator

IV. Related Vulnerabilities

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

V. Comments for CVE-2022-41970

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