Vulnerability Details : 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 18) allows attacker to request arbitrary files stored outside of intended frontend resources folder.
Vulnerability category: Directory traversal
Products affected by CVE-2020-36321
- cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
- cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
- cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
- cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-36321
0.37%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-36321
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST | |
5.9
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
2.2
|
3.6
|
Vaadin Ltd. |
CWE ids for CVE-2020-36321
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by:
- nvd@nist.gov (Primary)
- security@vaadin.com (Secondary)
References for CVE-2020-36321
-
https://github.com/vaadin/flow/pull/9392
fix: check if Url path is encoded twice in Dev Mode by mshabarov · Pull Request #9392 · vaadin/flow · GitHubPatch;Third Party Advisory
-
https://vaadin.com/security/cve-2020-36321
CVE-2020-36321: Directory traversal in development mode handler in Vaadin 14 and 15-17Vendor Advisory
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