What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-01 · updated 2026-06-17
• Weakness: CWE-284

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.

Affected products

• Nextcloud Server: from 24.0.0 before 24.0.7; 25.0.0 — fixed in 24.0.7

How to fix

Upgrade to a fixed version: Nextcloud Server 24.0.7. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9mh6-cph8-772c
• https://github.com/nextcloud/server/pull/34788
• https://hackerone.com/reports/1745766
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9mh6-cph8-772c
• https://github.com/nextcloud/server/pull/34788
• https://hackerone.com/reports/1745766

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