CVE-2021-39223
low-risk
Published 2021-10-25
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.
Do I need to act?
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0.35% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.8/10
Medium
NETWORK
/ HIGH complexity
Affected Products (1)
Richdocuments
Affected Vendors
References (6)
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4...
Permissions Required
https://hackerone.com/reports/1253460
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4...
Permissions Required
https://hackerone.com/reports/1253460
21
/ 100
low-risk
Severity
15/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal