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Fencer Intel
critical 9.8

CVE-2019-18928 json

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 authenti…

published 6y ago modified 4mo ago also EUVD-2019-8601

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

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.

Patch / fix

  • cyrus imap 2.5.14, 3.0.12
  • cyrus-imapd Debian 14, Debian 13, Debian 12 3.0.12-1

debian advisories DEBIAN-CVE-2019-18928

  • cyrus-imapd Ubuntu 20.04 LTS 3.0.12-1
  • cyrus-imapd Ubuntu Pro 18.04 LTS 2.5.10-3ubuntu1.1+esm1

ubuntu advisories UBUNTU-CVE-2019-18928

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cyrus-imapd RHEL 8 3.0.7-19.el8
  • cyrus-imapd-vzic RHEL 8 3.0.7-19.el8
  • cyrus-imapd-utils RHEL 8 3.0.7-19.el8

red hat advisories RHSA-2020:4655

  • cyrus-imapd openSUSE Tumbleweed 3.8.4-1.1

opensuse advisories openSUSE-SU-2025:14968-1

Is CVE-2019-18928 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-18928 updated cvss 7.4

cyrus-imapd: privilege escalation in HTTP request

  • Red Hat Enterprise Linux AppStream (v. 8) cyrus-imapd 3.0.7-19.el8, cyrus-imapd-vzic 3.0.7-19.el8, cyrus-imapd-utils 3.0.7-19.el8
    fixed: vendor fix RHSA-2020:4655
  • Red Hat Enterprise Linux 5 cyrus-imapd Red Hat Enterprise Linux 6 cyrus-imapd, cyrus-imapd-utils Red Hat Enterprise Linux 7 cyrus-imapd, cyrus-imapd-utils
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.39% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.