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Vulnerability record · CVE-2021-38562 · published 18 October 2021

CVE-2021-38562: Bestpractical request tracker observable discrepancy vulnerability

Bestpractical · Request Tracker

Best Practical Request Tracker (RT) 4.2 before 4.2.17, 4.4 before 4.4.5, and 5.0 before 5.0.2 allows sensitive information disclosure via a timing attack against lib/RT/REST2/Middleware/Auth.pm.

7.5 CVSS 3.1 High EPSS 1.8% · top 21.9% CWE-203 · Observable discrepancy
7.5CVSS 3.1 base score, v2 5.0
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

Best Practical Request Tracker (RT) 4.2 before 4.2.17, 4.4 before 4.4.5, and 5.0 before 5.0.2 allows sensitive information disclosure via a timing attack against lib/RT/REST2/Middleware/Auth.pm.

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

Affected products

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

References

LinkTags
https://docs.bestpractical.com/release-notes/rt/index.html Vendor Advisory
https://github.com/bestpractical/rt/commit/70749bb66cb13dd70bd53340c371038a5f3ca57c PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/06/msg00019.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2JK57CEEXLQF7MGBCUX76DZ
https://docs.bestpractical.com/release-notes/rt/index.html Vendor Advisory
https://github.com/bestpractical/rt/commit/70749bb66cb13dd70bd53340c371038a5f3ca57c PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/06/msg00019.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2JK57CEEXLQF7MGBCUX76DZ

Track CVE-2021-38562 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Source: NIST National Vulnerability Database (record CVE-2021-38562), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.