CVE-2021-33604
Reflected cross-site scripting in development mode handler in Vaadin 14, 15-19
2.5
LOW
CVSS 3.1
EPSS 0.05%
Description
URL encoding error in development mode handler in `com.vaadin:flow-server` versions 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows local user to execute arbitrary JavaScript code by opening crafted URL in browser. - https://vaadin.com/security/cve-2021-33604
How to fix CVE-2021-33604
To remediate CVE-2021-33604, upgrade the affected package to a fixed version below.
- —upgrade to 14.6.2 or later
Is CVE-2021-33604 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 14.0.0, < 14.6.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW2.5 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N |