Login Request a demo
High severity · published Apr 23, 2021
CVE-2020-36321
Improper URL validation in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.4.1 (Vaadin 14.0.0 through 14.4.2), and 3.0 prior to 5.0 (Vaadin 15 prior to…
7.5
CVSS
1.2%
EPSS
No
On KEV
Description
Improper URL validation in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.4.1 (Vaadin 14.0.0 through 14.4.2), and 3.0 prior to 5.0 (Vaadin 15 prior to 18) allows attacker to request arbitrary files stored outside of intended frontend resources folder.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flow · Vaadin
2.0.0 before 2.4.2; 3.0.0 before 5.0.0 · source: NVD
VA
Vaadin · Vaadin
14.0.0 before 14.4.3; 15.0.0 before 18.0.0 · source: NVD
Affected product
FL
Flow
Vaadin
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36321
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-36321
Patch
https://github.com/vaadin/flow/pull/9392
Vendor Advisory
https://vaadin.com/security/cve-2020-36321
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