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CVE-2020-36320Regular expression Denial of Service (ReDoS) in EmailValidator class in Vaadin 7
- 7.5HighCVSS base score
- 2.0%Exploitation in 30 daysEPSS · top 19% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Unsafe validation RegEx in EmailValidator class in com.vaadin:vaadin-server versions 7.0.0 through 7.7.21 (Vaadin 7.0.0 through 7.7.21) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.
Timeline
ID reserved
By Vaadin
- 10 days later
· 10 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)
- 2.0% · top 19% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 7.0.0 – < *
- affected 7.0.0 – < *
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavencom.vaadin:vaadin-bomGHSA-42j4-733x-5vcf (opens in a new tab)
- Mavencom.vaadin:vaadin-serverGHSA-42j4-733x-5vcf (opens in a new tab)
References
References3
- https://vaadin.com/security/cve-2020-36320 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/vaadin/framework/issues/7757 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/vaadin/framework/pull/12104 (opens in a new tab)x_refsource_MISCx_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-2021-0750 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-42j4-733x-5vcf (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2020-36320)Record last updated .