CVE-2023-28645

Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments

Description

Nextcloud richdocuments is a Nextcloud app integrating the office suit Collabora Online. In affected versions the secure view feature of the rich documents app can be bypassed by using unprotected internal API endpoint of the rich documents app. It is recommended that the Nextcloud Office app (richdocuments) is upgraded to 8.0.0-beta.1, 7.0.2 or 6.3.2. Users unable to upgrade may mitigate the issue by taking steps to restrict the ability to download documents. This includes ensuring that the `WOPI configuration` is configured to only serve documents between Nextcloud and Collabora. It is highly recommended to define the list of Collabora server IPs as the allow list within the Office admin settings of Nextcloud.

Category

5.7
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.09%
Vendor Advisory github.com Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-95j6-p5cj-5hh5 mitigation vendor advisory
https://github.com/nextcloud/richdocuments/pull/2604 patch vendor advisory
https://docs.nextcloud.com/server/latest/admin_manual/office/configuration.html#wopi-settings product

Frequently Asked Questions

What is the severity of CVE-2023-28645?
CVE-2023-28645 has been scored as a medium severity vulnerability.
How to fix CVE-2023-28645?
To fix CVE-2023-28645, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-28645 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-28645 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28645?
CVE-2023-28645 affects nextcloud security-advisories.
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