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CVE-2021-38562

25
FAUCET Score

CVE-2021-38562 is a sensitive information disclosure vulnerability affecting Best Practical Request Tracker (RT) versions 4.2.x before 4.2.17, 4.4.x before 4.4.5, and 5.0.x before 5.0.2. This vulnerability, rated High severity with a CVSS score of 7.5, allows an unauthenticated attacker to extract sensitive data through a timing attack against the REST2 authentication middleware. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.2.0, < 4.2.17CPE matchmatch criteria
cpe:2.3:a:bestpractical:request_tracker:*:*:*:*:*:*:*:*
>= 4.4.0, < 4.4.5CPE matchmatch criteria
cpe:2.3:a:bestpractical:request_tracker:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.0.2CPE matchmatch criteria
cpe:2.3:a:bestpractical:request_tracker:*:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.71%
Probability of exploitation in next 30 days
EPSS Percentile
74.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0171 is in the 57th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

docs.bestpractical.com / release-notes/rt/index.html
Vendor Advisory
github.com / bestpractical/rt/commit/70749bb66cb13dd70bd53340c371038a5f3ca57c
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2022/06/msg00019.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/2JK57CEEXLQF7MGBCUX76DZHXML7LUSQ