CVE-2021-31409Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19
- 7.5HighCVSS base score
- 1.7%Exploitation in 30 daysEPSS · top 23% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known 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.
Timeline
ID reserved
By Vaadin
- 20 days later
· 20 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VaadinCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.7% · top 23% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 8.0.0 – < *
Vaadin · vaadin-compatibility-server
- affected 8.0.0 – < *
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavencom.vaadin:vaadin-compatibility-serverGHSA-c332-w4jm-55wv (opens in a new tab)
References
References3
- https://vaadin.com/security/cve-2021-31409 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/vaadin/framework/issues/12240 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/vaadin/framework/pull/12241 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-1033 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-c332-w4jm-55wv (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-31409)Record last updated .