CVE-2021-32748

Nextcloud Richdocuments in an open source self hosted online office. Nextcloud uses the WOPI ("Web Application Open Platform Interface") protocol to communicate with the Collabora Editor, the communication between these two services was not protected by a credentials or IP check. Whilst this does not result in gaining access to data that the user has not yet access to, it can result in a bypass of any enforced watermark on documents as described on the [Nextcloud Virtual Data Room](https://nextcloud.com/virtual-data-room/) website and [our documentation](https://portal.nextcloud.com/article/nextcloud-and-virtual-data-room-configuration-59.html). The Nextcloud Richdocuments releases 3.8.3 and 4.2.0 add an additional admin settings for an allowlist of IP addresses that can access the WOPI API. We recommend upgrading and configuring the allowlist to a list of Collabora servers. There is no known workaround. Note that this primarily results a bypass of any configured watermark or download protection using File Access Control. If you do not require or rely on these as a security feature no immediate action is required on your end.

• CWE-862
• CWE-862

• https://github.com/nextcloud/richdocuments/pull/1640Third Party Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-24x8-h6m2-9jf2Third Party Advisory
• https://hackerone.com/reports/1194606Permissions Required
• https://github.com/nextcloud/richdocuments/pull/1640Third Party Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-24x8-h6m2-9jf2Third Party Advisory
• https://hackerone.com/reports/1194606Permissions Required

Published

Jul 27, 2021

Last Modified

Jun 17, 2026

Status

Modified

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-32742Vapor is a web framework for Swift. In versions 4.47.1 and p…9.1
• CVE-2021-32743Icinga is a monitoring system which checks the availability …8.8
• CVE-2021-32744Collabora Online is a collaborative online office suite. In …7.5
• CVE-2021-32745Collabora Online is a collaborative online office suite. A r…6.1
• CVE-2021-32746Icinga Web 2 is an open source monitoring web interface, fra…5.3
• CVE-2021-32747Icinga Web 2 is an open source monitoring web interface, fra…6.5
• CVE-2021-32749fail2ban is a daemon to ban hosts that cause multiple authen…8.1
• CVE-2021-3275Unauthenticated stored cross-site scripting (XSS) exists in …6.1
• CVE-2021-32750MuWire is a file publishing and networking tool that protect…5.7
• CVE-2021-32751Gradle is a build tool with a focus on build automation. In …7.5
• CVE-2021-32752Ether Logs is a package that allows one to check one's logs …4.9
• CVE-2021-32753EdgeX Foundry is an open source project for building a commo…6.5