CVE-2021-31412

mediumpriority · track · 21EPSS 0.013 · 71 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.32% (71st) EPSS

CVSS 4.3 · medium

Is it mine?

29 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-26

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · security@vaadin.comexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · OSV

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-1295USCWE-1295USCWE-20USCWE-668US

affected products (29)

Products and version ranges known to be affected.

Vaadin Vaadin≤ unspecified ≤10.0.18enisa_euvdEU
Vaadin Vaadin≤ unspecified ≤19.0.8enisa_euvdEU
Vaadin Vaadin≤ unspecified ≤14.6.1enisa_euvdEU
Vaadin Vaadin10.0.0 → unspecifiedenisa_euvdEU
Vaadin Vaadin11.0.0 → unspecifiedenisa_euvdEU
Vaadin Vaadin14.0.0 → unspecifiedenisa_euvdEU
Vaadin Vaadin15.0.0 → unspecifiedenisa_euvdEU
Vaadin Vaadinunspecified → 14.0.0enisa_euvdEU
Vaadin flow-server≤ unspecified ≤2.6.1enisa_euvdEU
Vaadin flow-server≤ unspecified ≤1.0.14enisa_euvdEU
Vaadin flow-server≤ unspecified ≤6.0.9enisa_euvdEU
Vaadin flow-server1.0.0 → unspecifiedenisa_euvdEU
Vaadin flow-server1.1.0 → unspecifiedenisa_euvdEU
Vaadin flow-server2.0.0 → unspecifiedenisa_euvdEU
Vaadin flow-server3.0.0 → unspecifiedenisa_euvdEU
Vaadin flow-serverunspecified → 2.0.0enisa_euvdEU
vaadin flow1.0.0 → 1.0.14nvdUScpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
vaadin flow1.1.0 → 1.4.0nvdUScpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
vaadin flow2.0.0 → 2.6.1nvdUScpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
vaadin flow3.0.0 → 5.0.0nvdUScpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*

showing 20 of 29

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-qrg9-f472-qwfmPossible route enumeration in production mode via RouteNotFoundError view in Vaadin 10, 11-14, and 15-192021-06-28ghsa · osvUS
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. - https://vaadin.com/security/cve-2021-31412

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2021-06-24modified 2026-06-17

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+25152 more

references (7)

External citations — patches, advisories, analysis.

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