CVE-2021-31412

moderate-risk
Published 2021-06-24

Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.

Do I need to act?

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0.69% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Flow

Affected Vendors

Vaadin

References (4)

Patch https://github.com/vaadin/flow/pull/11107
Vendor Advisory https://vaadin.com/security/cve-2021-31412
Patch https://github.com/vaadin/flow/pull/11107
Vendor Advisory https://vaadin.com/security/cve-2021-31412
30
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 2/34 · Minimal
Exposure 7/34 · Low