CVE-2021-39223 : Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Ri

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.

Published 2021-10-25 22:15:08

Updated 2021-10-29 14:43:56

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Information leak

Products affected by CVE-2021-39223

Nextcloud » Richdocuments
Versions from including (>=) 4.0.0 and before (<) 4.2.3
cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:*
Matching versions
Nextcloud » Richdocuments
Versions before (<) 3.8.6
cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-39223

EPSS FAQ

0.35%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 56 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-39223

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: None Availability: None
4.8	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N	1.2	3.6	GitHub, Inc.
Attack Vector: Network Attack Complexity: High Privileges Required: Low User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2021-39223

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Assigned by: security-advisories@github.com (Secondary)

References for CVE-2021-39223

https://hackerone.com/reports/1253460

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Permissions Required;Third Party Advisory
https://github.com/nextcloud/richdocuments/pull/1760

Unify error messages accross controllers by juliushaertl · Pull Request #1760 · nextcloud/richdocuments · GitHub
Patch;Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4cgj-6v93

File path disclosure of shared files in Richdocuments application · Advisory · nextcloud/security-advisories · GitHub
Third Party Advisory

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Vulnerability Details : CVE-2021-39223

Products affected by CVE-2021-39223

Exploit prediction scoring system (EPSS) score for CVE-2021-39223

CVSS scores for CVE-2021-39223

CWE ids for CVE-2021-39223

References for CVE-2021-39223