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CVE-2021-31412

18
FAUCET Score

CVE-2021-31412 is a path sanitization vulnerability in Vaadin Flow, affecting versions 1.0.0 through 1.0.14, 1.1.0 prior to 2.0.0, 2.0.0 through 2.6.1, and 3.0.0 through 6.0.9. This medium-severity vulnerability (CVSS 5.3) allows an unauthenticated network attacker to enumerate all available routes in a Vaadin application running in production mode, provided no custom NotFoundException handler is present. The impact is limited to information disclosure (C:L). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, <= 1.0.14CPE matchmatch criteria
cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
>= 1.1.0, <= 1.4.0CPE matchmatch criteria
cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
>= 2.0.0, <= 2.6.1CPE matchmatch criteria
cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
>= 3.0.0, <= 5.0.0CPE matchmatch criteria
cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
>= 6.0.0, <= 6.0.9CPE matchmatch criteria
cpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.32%
Probability of exploitation in next 30 days
EPSS Percentile
67.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0132 is in the 48th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.vaadin:vaadin-bomFixed in: 10.0.19
mavenpatch availablevia ghsa
Product: com.vaadin:vaadin-bomFixed in: 14.6.2
mavenpatch availablevia ghsa
Product: com.vaadin:vaadin-bomFixed in: 19.0.9

Vendor Advisories (1)

mavenGHSA-qrg9-f472-qwfmmedium

Possible route enumeration in production mode via RouteNotFoundError view in Vaadin 10, 11-14, and 15-19

Jun 28, 2021

References

github.com / vaadin/flow/pull/11107
PatchThird Party Advisory
vaadin.com / security/cve-2021-31412
Vendor Advisory