What’s Vulnerable › Vulnerabilities

CVE-2019-18928

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-11-15 · updated 2026-06-17

Description

Cyrus IMAP 2.5.x before 2.5.14 and 3.x before 3.0.12 allows privilege escalation because an HTTP request may be interpreted in the authentication context of an unrelated previous request that arrived over the same connection.

Affected products

• cyrusimap Cyrus IMAP: from 2.5.0 before 2.5.14; from 3.0.0 before 3.0.12 — fixed in 2.5.14, 3.0.12
• Debian Linux: 9.0
• Fedoraproject Fedora: 30, 31

How to fix

Upgrade to a fixed version: cyrusimap Cyrus IMAP 2.5.14, 3.0.12. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2022/06/msg00013.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAGKPZDXQ6KRUGQVRAO6N4PCINP6KS5F/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PHV3TUU53WCKJ3BBRK2EHAF44MSZEFK6/
• https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.14.html
• https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.12.html
• https://lists.debian.org/debian-lts-announce/2022/06/msg00013.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAGKPZDXQ6KRUGQVRAO6N4PCINP6KS5F/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PHV3TUU53WCKJ3BBRK2EHAF44MSZEFK6/
• https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.14.html
• https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.12.html

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