File path disclosure of shared files in Richdocuments application
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Richdocuments application prior to versions 3.8.6 and 4.2.3 returned verbatim exception messages to the user. This could result in a full path disclosure on shared files. (e.g. an attacker could see that the file `shared.txt` is located within `/files/$username/Myfolder/Mysubfolder/shared.txt`). It is recommended that the Richdocuments application is upgraded to 3.8.6 or 4.2.3. As a workaround, disable the Richdocuments application in the app settings.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA security-advisories (nextcloud) Fixed in 4.2.3
Timeline
- 2026-10-02 Threatist record created from CVE-2021-39223
References
More nextcloud Richdocuments vulnerabilities
- TI-2021-15503 File Drop can be bypassed using Richdocuments app in nextcloud CVSS 3.1HIGH 7.5
- TI-2023-13163 Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments CVSS 3.1MEDIUM 6.5
- TI-2022-13069 Federated editing allows iframing remote servers by default in richdocuments CVSS 3.1MEDIUM 6.5
- TI-2023-10612 Document content of files can be obtained through Collabora for files of other users CVSS 3.1MEDIUM 5.8
- TI-2021-15504 Lack of ratelimit on Richdocuments OCS endpoint in nextcloud CVSS 3.1MEDIUM 5.3
- TI-2023-10621 Nextcloud Server previews are accessible without a watermark CVSS 3.1MEDIUM 5.3
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences