CVE-2023-28645
5.7 · MEDIUMOverview
CVE-2023-28645 is a medium-severity vulnerability affecting nextcloud richdocuments. It was published on March 31, 2023 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from nextcloud. Update richdocuments to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nextcloud | richdocuments | >= 6.0.0, < 6.3.2 | Affected |
References
Frequently Asked Questions
What is CVE-2023-28645?
CVE-2023-28645 is a medium-severity vulnerability affecting nextcloud richdocuments. It was published on March 31, 2023 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
How severe is CVE-2023-28645?
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2023-28645?
Check the references section for vendor advisories and patches from nextcloud. Update richdocuments to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-28645?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-28645 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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