Home/CVE/Nextcloud richdocuments is a Nextcloud app integrating the office suit Collabora Online. In affected versions the secure
CVE

CVE-2023-28645

Nextcloud richdocuments is a Nextcloud app integrating the office suit Collabora Online. In affected versions the secure

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.

MEDIUM · CVSS 5.7 EPSS 0.00203
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-284Improper Access Control
▤

Affected Products & Versions

2
nextcloud richdocuments>= 6.0.0 and < 6.3.2
nextcloud richdocuments>= 7.0.0 and < 7.0.2
▣

Scoring & Timeline

5.7
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Mar 2023 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://docs.nextcloud.com/server/latest/admin_manual/office/configuration.html#wopi-settingsProduct
https://github.com/nextcloud/richdocuments/pull/2604PatchVendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-95j6-p5cj-5hh5MitigationVendor Advisory
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