Medium severity · published Jun 11, 2021
CVE-2021-22906
Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users
6.5
CVSS
0.7%
EPSS
No
On KEV
Description
Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EE
End-to-end Encryption · Nextcloud
before 1.5.3; 1.6.0 before 1.6.3; 1.7.0 before 1.7.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22906
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22906
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3829-45wm-ww36
Exploit
https://hackerone.com/reports/1189174
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