CVE-2021-31864

critical

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

9.5

Description

Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows attackers to bypass the add_issue_notes permission requirement by leveraging the incoming mail handler.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-31864

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202105-1

OS impact

OS	Version	Status	Fixed in
arch		fixed	`4.2.1-1`
debian	bookworm	fixed	`5.0.0-1`
debian	sid	fixed	`5.0.0-1`
debian	trixie	fixed	`5.0.0-1`

References

https://security.archlinux.org/ASA-202105-1
https://security-tracker.debian.org/tracker/CVE-2021-31864

Verify integrity in audit chain (admin only). AS-IS.