CVE-2019-18928

Name: CVE-2019-18928
Creator: NVD / NIST
Published: 2019-11-15T04:15:10.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.39%

Last modified Jun 17, 2026

CVE-2019-18928 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 2.39% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.39%

81.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cyrus	Imap	>= 2.5.0, < 2.5.14
Cyrus	Imap	>= 3.0.0, < 3.0.12
Fedoraproject	Fedora	30
Fedoraproject	Fedora	31
Debian	Debian Linux	9.0

References

https://lists.debian.org/debian-lts-announce/2022/06/msg00013.htmlMailing List, Third Party Advisory
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.htmlPatch, Release Notes, Third Party Advisory
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.12.htmlPatch, Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/06/msg00013.htmlMailing List, Third Party Advisory
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.htmlPatch, Release Notes, Third Party Advisory
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.12.htmlPatch, Release Notes, Third Party Advisory

Timeline

Published: Nov 15, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18928?

How severe is CVE-2019-18928?

CVE-2019-18928 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.39% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18928?

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-2019-18928?

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

Scan your code now

Source: NVD / NIST