CVE-2023-49791

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when an attacker manages to get access to an active session of another user via another way, they could delete and modify workflows by sending calls directly to the API bypassing the password confirmation shown in the UI. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.

• CWE-284
• CWE-287

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f8p-6qww-2prrVendor Advisory
• https://github.com/nextcloud/server/pull/41520Patch
• https://hackerone.com/reports/2120667Permissions Required
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f8p-6qww-2prrVendor Advisory
• https://github.com/nextcloud/server/pull/41520Patch
• https://hackerone.com/reports/2120667Permissions Required

Published

Dec 22, 2023

Last Modified

Jun 17, 2026

Status

Modified

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