Vulnerability · Published Apr 23, 2021 · Assigned by Vaadin
CVE-2020-36321Directory traversal in development mode handler in Vaadin 14 and 15-17
Medium 5.9
In plain English
A medium-severity path traversal in flow-server from Vaadin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)1.2%top 31.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | com.vaadin:flow-server | 5.0.0 | GHSA-49r2-73m6-pp8f |
| Maven | com.vaadin:flow-server | 2.4.2 | GHSA-49r2-73m6-pp8f |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Vaadin | Vaadin | 14.0.0 – before * |
| Vaadin | flow-server | 2.0.0 – before * |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://vaadin.com/security/cve-2020-36321 x_refsource_MISC
- https://github.com/vaadin/flow/pull/9392 x_refsource_MISC