CVE-2021-42326

Name: CVE-2021-42326
Creator: NVD / NIST
Published: 2021-10-12T19:15:08.047+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.13%

Last modified Jun 17, 2026

CVE-2021-42326 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.13%

62.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Redmine	Redmine	< 4.1.5
Redmine	Redmine	>= 4.2.0, < 4.2.3
Debian	Debian Linux	9.0

References

https://lists.debian.org/debian-lts-announce/2021/10/msg00013.htmlThird Party Advisory
https://www.redmine.org/news/133Mitigation, Vendor Advisory
https://www.redmine.org/projects/redmine/wiki/Changelog_4_1#415-2021-10-10Release Notes, Vendor Advisory
https://www.redmine.org/projects/redmine/wiki/Changelog_4_2#423-2021-10-10Release Notes, Vendor Advisory
https://www.redmine.org/projects/redmine/wiki/Security_AdvisoriesPatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00013.htmlThird Party Advisory
https://www.redmine.org/news/133Mitigation, Vendor Advisory
https://www.redmine.org/projects/redmine/wiki/Changelog_4_1#415-2021-10-10Release Notes, Vendor Advisory
https://www.redmine.org/projects/redmine/wiki/Changelog_4_2#423-2021-10-10Release Notes, Vendor Advisory
https://www.redmine.org/projects/redmine/wiki/Security_AdvisoriesPatch, Vendor Advisory

Timeline

Published: Oct 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42326?

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.

How severe is CVE-2021-42326?

CVE-2021-42326 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42326?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42326?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST