CVE-2021-39223
mediumpriority · track · 21EPSS 0.011 · 64 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (11)
External citations — patches, advisories, analysis.
- https://github.com/nextcloud/richdocuments/pull/1760cnnvd
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4cgj-6v93cnnvd
- https://hackerone.com/reports/1253460cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-39223cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021102618cnnvd
- https://github.com/nextcloud/richdocuments/pull/1760enisa_euvd
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4cgj-6v93enisa_euvd
- https://hackerone.com/reports/1253460enisa_euvd
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