Regular expression Denial of Service (ReDoS) in EmailValidator class in V7 compatibility module in Vaadin 8

HIGH 7.5CVE-2021-31409 · GHSA-c332-w4jm-55wv · Published 06/05/2021 · updated 17/06/2026

In short

CVE-2021-31409 is a HIGH (CVSS 7.5) vulnerability affecting com.vaadin:vaadin-compatibility-server, vaadin (vaadin).
Chance of exploitation in the next 30 days (EPSS): 1.7%, higher than 76.8% of all vulnerabilities.
Fix: update to 8.13.0 or later.

Package	Affected versions	Patched versions
com.vaadin:vaadin-compatibility-server Maven	`≥ 8.0.0, < 8.13.0`	`8.13.0`
vaadin vaadin	`≥ 8.0.0, ≤ 8.12.4`	No fix yet

Description

Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

NVD description

Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

References

vaadin/framework security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2021-31409 · ADVISORY
vaadin/framework · WEB
vaadin/framework#12241 · WEB
vaadin.com/security/cve-2021-31409 · WEB

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