High severity · published Apr 14, 2021
CVE-2021-22879
Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands
8.8
CVSS
5%
EPSS
No
On KEV
Description
Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.0% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
Desktop · Nextcloud
before 3.1.3 · source: NVD
FE
Fedora · Fedoraproject
33 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22879
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22879
Patch
https://github.com/nextcloud/desktop/pull/2906
Exploit
https://hackerone.com/reports/1078002
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTWBJAS5DJJIK7LLVBZZQTSJASUVIRVE/
Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2021-008
Third Party Advisory
https://security.gentoo.org/glsa/202105-37
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