Project sources exposure in Vaadin Designer

published 2021-04-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18312

cvss: 8.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

Overly relaxed configuration of frontend resources server in Vaadin Designer versions 4.3.0 through 4.6.3 allows remote attackers to access project sources via crafted HTTP request.

Patch / fix

fixed in 1

vaadin designer 4.6.4

Exploit prediction

1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

Vaadin Designer

Classification

Weakness

CWE-402 Transmission of Private Resources into a New Sphere
CWE-668 Exposure of Resource to Wrong Sphere

References

vaadin.com /security/cve-2021-31410
vendor-advisory

Sources

CVE List CVE-2021-31410
NVD CVE-2021-31410

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary