7.5
HIGH
CVE-2020-36321
Vaadin Flow Server URL Validation Vulnerability (Path Traversal)
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.

INFO

Published Date :

April 23, 2021, 4:15 p.m.

Last Modified :

May 5, 2021, 5:26 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-36321 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Vaadin vaadin
2 Vaadin flow
3 Vaadin flow-server
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-36321.

URL Resource
https://github.com/vaadin/flow/pull/9392 Patch Third Party Advisory
https://vaadin.com/security/cve-2020-36321 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-36321 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-36321 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    May. 05, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://github.com/vaadin/flow/pull/9392 No Types Assigned https://github.com/vaadin/flow/pull/9392 Patch, Third Party Advisory
    Changed Reference Type https://vaadin.com/security/cve-2020-36321 No Types Assigned https://vaadin.com/security/cve-2020-36321 Vendor Advisory
    Added CWE NIST CWE-22
    Added CPE Configuration OR *cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:* versions from (including) 2.0.0 up to (excluding) 2.4.2 *cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (excluding) 5.0.0 *cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:* versions from (including) 14.0.0 up to (excluding) 14.4.3 *cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:* versions from (including) 15.0.0 up to (excluding) 18.0.0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-36321 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.37 }} 0.03%

score

0.69541

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability