High severity · published May 5, 2021
CVE-2021-31411
Insecure temporary directory usage in frontend build functionality of com.vaadin:flow-server versions 2.0.9 through 2.5.2 (Vaadin 14.0.3 through Vaadin 14.5.2), 3.0 prior to 6.0…
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
Insecure temporary directory usage in frontend build functionality of com.vaadin:flow-server versions 2.0.9 through 2.5.2 (Vaadin 14.0.3 through Vaadin 14.5.2), 3.0 prior to 6.0 (Vaadin 15 prior to 19), and 6.0.0 through 6.0.5 (Vaadin 19.0.0 through 19.0.4) allows local users to inject malicious code into frontend resources during application rebuilds.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flow · Vaadin
2.0.9 before 2.5.3; 3.0.0 through 5.0.0; 6.0.0 through 6.0.6 · source: NVD
VA
Vaadin · Vaadin
14.0.3 before 14.5.3; 15.0.0 before 19.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31411
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31411
Patch
https://github.com/vaadin/flow/pull/10640
Vendor Advisory
https://vaadin.com/security/cve-2021-31411
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