What’s Vulnerable › Vulnerabilities

CVE-2021-42326

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-12 · updated 2026-06-17

Description

Redmine before 4.1.5 and 4.2.x before 4.2.3 may disclose the names of users on activity views due to an insufficient access filter.

Affected products

• Debian Linux: 9.0
• Redmine: before 4.1.5; from 4.2.0 before 4.2.3 — fixed in 4.1.5, 4.2.3

How to fix

Upgrade to a fixed version: Redmine 4.1.5, 4.2.3. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2021/10/msg00013.html
• https://www.redmine.org/news/133
• https://www.redmine.org/projects/redmine/wiki/Changelog_4_1#415-2021-10-10
• https://www.redmine.org/projects/redmine/wiki/Changelog_4_2#423-2021-10-10
• https://www.redmine.org/projects/redmine/wiki/Security_Advisories
• https://lists.debian.org/debian-lts-announce/2021/10/msg00013.html
• https://www.redmine.org/news/133
• https://www.redmine.org/projects/redmine/wiki/Changelog_4_1#415-2021-10-10
• https://www.redmine.org/projects/redmine/wiki/Changelog_4_2#423-2021-10-10
• https://www.redmine.org/projects/redmine/wiki/Security_Advisories

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