Critical severity · published Feb 9, 2021
CVE-2020-28645
Deleting users with certain names caused system files to be deleted
9.1
CVSS
1.2%
EPSS
No
On KEV
Description
Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions < 10.6.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OW
Owncloud · Owncloud
before 10.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28645
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-28645
Vendor Advisory
https://owncloud.com/security-advisories/missing-user-validation-leading-to-information-disclosure/
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