Medium severity · published Jan 26, 2021
CVE-2020-8293
A missing input validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows users to store unlimited data in workflow rules causing load and potential DDoS on later…
6.5
CVSS
1.6%
EPSS
No
On KEV
Description
A missing input validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows users to store unlimited data in workflow rules causing load and potential DDoS on later interactions and usage with those rules.
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)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 18.0.11; 19.0.0 before 19.0.5; 20.0.0 before 20.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8293
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8293
Third Party Advisory
https://hackerone.com/reports/1018146
Broken Link
https://nextcloud.com/security/advisory/?id=NC-SA-2021-001
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