CVE-2021-32056

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-10 · updated 2026-06-17
Weakness: CWE-732

Description

Cyrus IMAP before 3.2.7, and 3.3.x and 3.4.x before 3.4.1, allows remote authenticated users to bypass intended access restrictions on server annotations and consequently cause replication to stall.

Affected products

cyrusimap Cyrus IMAP: before 3.2.7; from 3.3.0 before 3.4.1 — fixed in 3.2.7, 3.4.1
Fedoraproject Fedora: 34, 35

How to fix

Upgrade to a fixed version: cyrusimap Cyrus IMAP 3.2.7, 3.4.1. Check the vendor advisory for mitigations.

References

https://cyrus.topicbox.com/groups/announce/T056901c106ecfce3/cyrus-imap-3-4-1-released
https://cyrus.topicbox.com/groups/announce/T126392718bc29d6b/cyrus-imap-3-2-7-released
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HEO3RURJW6NLIXS7NK5PVU6MGHC4SCM/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJZB45QBUN7CZFGOWCZYUYACNBTX7LVS/
https://www.cyrusimap.org/imap/download/release-notes/3.2/x/3.2.7.html
https://www.cyrusimap.org/imap/download/release-notes/3.4/x/3.4.1.html
https://cyrus.topicbox.com/groups/announce/T056901c106ecfce3/cyrus-imap-3-4-1-released
https://cyrus.topicbox.com/groups/announce/T126392718bc29d6b/cyrus-imap-3-2-7-released
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HEO3RURJW6NLIXS7NK5PVU6MGHC4SCM/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJZB45QBUN7CZFGOWCZYUYACNBTX7LVS/
https://www.cyrusimap.org/imap/download/release-notes/3.2/x/3.2.7.html
https://www.cyrusimap.org/imap/download/release-notes/3.4/x/3.4.1.html

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