CVE-2021-38562
Best Practical Request Tracker (RT) 4.2 before 4.2.17, 4.4 before 4.4.5, and 5.0 before 5.0.2...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
7.5
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.
- Record
CVE-2021-38562- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-203
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-38562- Updated
- 2026-11-02
EUVDEUVD-2021-25004 No score
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.
- Record
EUVD-2021-25004- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f58f-h8w5-jgjr
7.5
Best Practical Request Tracker (RT) 4.2 before 4.2.17, 4.4 before 4.4.5, and 5.0 before 5.0.2...
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.
- Record
GHSA-f58f-h8w5-jgjr- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-203
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-38562
7.5
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.
- Record
ALPINE-CVE-2021-38562- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
OSV
7.5
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.
- Record
CVE-2021-38562- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Show 4 moreShow less
OSVDEBIAN-CVE-2021-38562
7.5
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.
- Record
DEBIAN-CVE-2021-38562- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-38562
7.5
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.
- Record
UBUNTU-CVE-2021-38562- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUSN-6529-1 No score
request-tracker4 vulnerabilities
It was discovered that Request Tracker incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to obtain sensitive information. (CVE-2021-38562, CVE-2022-25802, CVE-2023-41259, CVE-2023-41260)
- Record
USN-6529-1- Updated
- 2026-11-02
OSVUSN-7692-1 No score
request-tracker5 vulnerabilities
It was discovered that Request Tracker was susceptible to timing attacks. An attacker could possibly use this issue to access sensitive information. This issue only affected Ubuntu 22.04 LTS. (CVE-2021-38562)
It was discovered that Request Tracker was susceptible to cross-site scripting attacks when malicious attachments were supplied. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-25802)
It was discovered that Request Tracker would incorrectly redirect users in certain instances. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-25803)
Tom Wolters discovered that Request Tracker could leak information when malicious email headers were supplied. An attacker could possibly use this issue to access sensitive information. This issue only affected Ubuntu 22.04 LTS. (CVE-2023-41259, CVE-2023-41260)
It was discovered that Request Tracker could leak information through its transaction search. An attacker with access to the transaction query builder of Request Tracker could possibly use this issue to access sensitive information. This issue only affected Ubuntu 22.04 LTS. (CVE-2023-45024)
It was discovered that Request Tracker erroneously stored ticket information in a web browser's cache. An attacker with direct access to a system could possibly use this issue to access sensitive information. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-3262)
It was discovered that Request Tracker made use of an obsolete cryptographic algorithm for emails sent with S/MIME encryption. An attacker could possibly use this issue to access sensitive information. (CVE-2025-2545)
It was discovered that Request Tracker was susceptible to cross-site scripting attacks when malicious parameters were included in a search URL. An attacker could possibly use this issue to execute arbitrary code. (CVE-2025-30087)
It was discovered that Request Tracker was susceptible to cross-site scripting attacks when malicious permalinks or assets were provided. An attacker could possibly use this issue to execute arbitrary code. (CVE-2025-31500, CVE-2025-31501)
- Record
USN-7692-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
rt4Alpine:v3.20 |
before 4.4.7-r0 | 4.4.7-r0 |
rt4Alpine:v3.21 |
before 4.4.7-r0 | 4.4.7-r0 |
rt4Alpine:v3.22 |
before 4.4.7-r0 | 4.4.7-r0 |
rt4Alpine:v3.23 |
before 4.4.7-r0 | 4.4.7-r0 |
rt4Alpine:v3.24 |
before 4.4.7-r0 | 4.4.7-r0 |
request-tracker4Debian:12 |
before 4.4.4+dfsg-3 | 4.4.4+dfsg-3 |
request-tracker5Debian:12 |
before 5.0.3+dfsg-1 | 5.0.3+dfsg-1 |
request-tracker5Debian:13 |
before 5.0.3+dfsg-1 | 5.0.3+dfsg-1 |
request-tracker5Debian:14 |
before 5.0.3+dfsg-1 | 5.0.3+dfsg-1 |
request-tracker4Debian:9 |
before 4.4.1-3+deb9u4, plus listed versions 4.4.1-34.4.1-3+deb9u14.4.1-3+deb9u24.4.1-3+deb9u3 |
4.4.1-3+deb9u4 |
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| Package | Affected | Fixed |
|---|---|---|
request-tracker4Ubuntu:16.04:LTS |
All versions, plus listed versions 4.2.11-24.2.12-34.2.12-44.2.12-5 |
None known |
request-tracker4Ubuntu:Pro:18.04:LTS |
before 4.4.2-2ubuntu0.1~esm1, plus listed versions 4.4.1-54.4.2-14.4.2-2 |
4.4.2-2ubuntu0.1~esm1 |
request-tracker4Ubuntu:20.04:LTS |
before 4.4.3-2+deb10u3build0.20.04.1, plus listed versions 4.4.3-2 |
4.4.3-2+deb10u3build0.20.04.1 |
request-tracker4Ubuntu:22.04:LTS |
before 4.4.4+dfsg-2ubuntu1.22.04.1, plus listed versions 4.4.4+dfsg-2ubuntu1 |
4.4.4+dfsg-2ubuntu1.22.04.1 |
request-tracker5Ubuntu:Pro:22.04:LTS |
before 5.0.1+dfsg-1ubuntu1+esm1, plus listed versions 5.0.1+dfsg-1ubuntu1 |
5.0.1+dfsg-1ubuntu1+esm1 |
request-tracker4Ubuntu:24.04:LTS |
before 4.4.4+dfsg-2ubuntu2, plus listed versions 4.4.4+dfsg-2ubuntu1 |
4.4.4+dfsg-2ubuntu2 |
request-tracker4Ubuntu:Pro:18.04:LTS From an advisory covering 4 CVEs |
before 4.4.2-2ubuntu0.1~esm1, plus listed versions 4.4.1-54.4.2-14.4.2-2 |
4.4.2-2ubuntu0.1~esm1 |
request-tracker4Ubuntu:20.04:LTS From an advisory covering 4 CVEs |
before 4.4.3-2+deb10u3build0.20.04.1, plus listed versions 4.4.3-2 |
4.4.3-2+deb10u3build0.20.04.1 |
request-tracker4Ubuntu:22.04:LTS From an advisory covering 4 CVEs |
before 4.4.4+dfsg-2ubuntu1.22.04.1, plus listed versions 4.4.4+dfsg-2ubuntu1 |
4.4.4+dfsg-2ubuntu1.22.04.1 |
request-tracker5Ubuntu:Pro:22.04:LTS From an advisory covering 11 CVEs |
before 5.0.1+dfsg-1ubuntu1+esm1, plus listed versions 5.0.1+dfsg-1ubuntu1 |
5.0.1+dfsg-1ubuntu1+esm1 |
request-tracker5Ubuntu:Pro:24.04:LTS From an advisory covering 11 CVEs |
before 5.0.5+dfsg-2ubuntu0.1~esm1, plus listed versions 5.0.1+dfsg-1ubuntu15.0.5+dfsg-2 |
5.0.5+dfsg-2ubuntu0.1~esm1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected, aliases, references | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-38562 is a high vulnerability (CVSS 7.5) in Bestpractical Request Tracker, published October 18, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.84%, the 79th percentile. Fixed in rt4 4.4.7-r0.
References
docs.bestpractical.com/release-notes/rt/index.html
github.com/bestpractical/rt/commit/70749bb66cb13dd70bd53340c371038a5f3ca57c
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2JK57CEEXLQF7MGBCUX76DZHXML7LUSQ
lists.debian.org/debian-lts-announce/2022/06/msg00019.html
nvd.nist.gov/vuln/detail/CVE-2021-38562
lists.fedoraproject.org/archives/list/[email protected]/message/2JK57CEEXLQF7MGBCUX76DZHXML7LUSQ
Show 20 moreShow less
github.com/advisories/GHSA-f58f-h8w5-jgjr
security.alpinelinux.org/vuln/CVE-2021-38562
security-tracker.debian.org/tracker/CVE-2021-38562
ubuntu.com/security/CVE-2021-38562
docs.bestpractical.com/release-notes/rt/5.0.2
docs.bestpractical.com/release-notes/rt/4.4.5
docs.bestpractical.com/release-notes/rt/4.2.17
ubuntu.com/security/notices/USN-6529-1
cve.org/CVERecord?id=CVE-2021-38562
ubuntu.com/security/notices/USN-7692-1
ubuntu.com/security/CVE-2022-25802
ubuntu.com/security/CVE-2023-41259
ubuntu.com/security/CVE-2023-41260
ubuntu.com/security/CVE-2022-25803
ubuntu.com/security/CVE-2023-45024
ubuntu.com/security/CVE-2024-3262
ubuntu.com/security/CVE-2025-2545
ubuntu.com/security/CVE-2025-30087
ubuntu.com/security/CVE-2025-31500
ubuntu.com/security/CVE-2025-31501