CVE-2021-32748
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/)…
Does this matter?
Lower severity and a low EPSS score (0.99%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 0.99% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Affected
- nextcloud/richdocuments
- Source
- security-advisories@github.com
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.