Medium severity · published Mar 10, 2022
CVE-2021-41233
Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server
5.3
CVSS
0.8%
EPSS
No
On KEV
Description
Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server. Due to an issue with the Nextcloud Text application, which is by default shipped with Nextcloud Server, an attacker is able to access the folder names of "File Drop". For successful exploitation an attacker requires knowledge of the sharing link. It is recommended that users upgrade their Nextcloud Server to 20.0.14, 21.0.6 or 22.2.1. Users unable to upgrade should disable the Nextcloud Text application in the application settings.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 20.0.14; 21.0.0 before 21.0.6; 22.2.0 before 22.2.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-41233
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-41233
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-26c8-35cm-xq9m
Patch
https://github.com/nextcloud/text/pull/1884
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