CVE-2023-28645 Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments
Attackers can bypass secure view restrictions in Nextcloud richdocuments via an unprotected internal API endpoint, allowing unauthorized document access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-28645?
CVE-2023-28645 is a medium-severity vulnerability in nextcloud security-advisories, published on 31 Mar 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-284
Which versions are affected by CVE-2023-28645?
It affects 1 product.
Products include Nextcloud Richdocuments.
How do I fix CVE-2023-28645?
No fix has been published for CVE-2023-28645 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-28645 being exploited?
There is no known exploitation of CVE-2023-28645 in the wild and no public exploit code.
Other vulnerabilities in nextcloud security-advisories
- CVE-2021-37628 File Drop can be bypassed using Richdocuments app in nextcloud
- CVE-2022-31024 Federated editing allows iframing remote servers by default in richdocuments
- CVE-2023-25150 Document content of files can be obtained through Collabora for files of other users
- CVE-2021-37629 Lack of ratelimit on Richdocuments OCS endpoint in nextcloud
- CVE-2021-39223 File path disclosure of shared files in Richdocuments application
Sources
Also known as GHSA-95j6-p5cj-5hh5.