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Fencer Intel
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 5y ago modified 4mo 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

Is CVE-2021-38562 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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, 2026-11-09).

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 Intel 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.