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CVE-2021-31406

MEDIUM
Published 2021-04-23T16:05:41.375797Z
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CVSS Score

V3.1
4.0
/10
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.170
Higher than 17.0% of all CVEs

Attack Vector Metrics

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
LOW
Integrity
LOW
Availability
NONE

Description

Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Vaadin

Vaadin

Affected Versions:

19.0.0 15.0.0
Vaadin

flow-server

Affected Versions:

6.0.0 3.0.0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Timing side channel vulnerability in endpoint request handler in Vaadin 15-19

GHSA-p7jq-v8jp-j424

Advisory Details

Non-constant-time comparison of CSRF tokens in endpoint request handler in `com.vaadin:flow-server` versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack. - https://vaadin.com/security/cve-2021-31406

Affected Packages

Maven com.vaadin:flow-server
ECOSYSTEM: ≥3.0.0 <5.0.4
Maven com.vaadin:flow-server
ECOSYSTEM: ≥6.0.0 <6.0.1

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

WEB https://github.com/vaadin/flow/security/advisories/GHSA-p7jq-v8jp-j424
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-31406
WEB https://github.com/vaadin/flow/pull/10157
WEB https://vaadin.com/security/cve-2021-31406

Advisory provided by GitHub Security Advisory Database. Published: April 19, 2021, Modified: April 16, 2021

References

https://vaadin.com/security/cve-2021-31406
https://github.com/vaadin/flow/pull/10157
Published: 2021-04-23T16:05:41.375797Z
Last Modified: 2024-09-17T00:02:31.310Z
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