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Fencer Vulns
high 7.5

CVE-2021-38562 json

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…

published 2021-10-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25004

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

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.

Patch / fix

  • bestpractical request_tracker 4.2.17, 4.4.5, 5.0.2
  • request-tracker4 Debian 12 4.4.4+dfsg-3
  • request-tracker5 Debian 14, Debian 13, Debian 12 5.0.3+dfsg-1

debian advisories DEBIAN-CVE-2021-38562

  • request-tracker4 Ubuntu 20.04 LTS 4.4.3-2+deb10u3build0.20.04.1
  • request-tracker4 Ubuntu 22.04 LTS 4.4.4+dfsg-2ubuntu1.22.04.1
  • request-tracker4 Ubuntu 24.04 LTS 4.4.4+dfsg-2ubuntu2
  • request-tracker4 Ubuntu Pro 18.04 LTS 4.4.2-2ubuntu0.1~esm1
  • request-tracker5 Ubuntu Pro 22.04 LTS 5.0.1+dfsg-1ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2021-38562

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rt4 Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 4.4.7-r0

alpine advisories ALPINE-CVE-2021-38562

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-38562 updated cvss 7.5

rt: User enumeration through a timing side-channel attack

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.84% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.