CVE-2021-33611: Reflected cross-site scripting in vaadin-menu-bar webjar resources in Vaadin 14

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-11-02 · updated 2026-06-17
Weakness: CWE-79

Description

Missing output sanitization in test sources in org.webjars.bowergithub.vaadin:vaadin-menu-bar versions 1.0.0 through 1.2.0 (Vaadin 14.0.0 through 14.4.4) allows remote attackers to execute malicious JavaScript in browser by opening crafted URL

Affected products

Vaadin: from 14.0.0 through 14.4.4
vaadin-menu-bar: from 1.0.0 through 1.2.0

References

https://github.com/vaadin/vaadin-menu-bar/pull/126
https://vaadin.com/security/cve-2021-33611
https://github.com/vaadin/vaadin-menu-bar/pull/126
https://vaadin.com/security/cve-2021-33611

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