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Vulnerability record · CVE-2021-3642 · published 5 August 2021

CVE-2021-3642: Redhat wildfly elytron observable discrepancy vulnerability

Redhat · Wildfly Elytron

A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.

5.3 CVSS 3.1 Medium EPSS 0.85% · top 43.6% CWE-203 · Observable discrepancy
5.3CVSS 3.1 base score, v2 3.5
0.85%EPSS exploitation probability, 30 days
NoNot in CISA KEV
13Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.

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

Affected products

13 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1981407 Issue TrackingVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1981407 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-3642), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.