cyrus-imapd: lmtpd component created mailboxes with administrator privileges if the "fileinto" was used, bypassing ACL checks
Published Dec 16, 2019
6.5
MEDIUMCVSS 3.1
EPSS 1.65%
Description
An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed (3.x) or certain non-default sieve options are enabled (2.x), a user with a mail account on the service can use a sieve script containing a fileinto directive to create any mailbox with administrator privileges, because of folder mishandling in autosieve_createfolder() in imap/lmtp_sieve.c.
Affected products
No data.
Configuration 1
Configuration 2
- 9.0
- 10.0
Configuration 3
- 30
- 31
Configuration 4
- 18.04
No data.
Red Hat Enterprise Linux 8
cyrus-imapd-0:3.0.7-19.el8
Fixed · RHSA-2020:4655
Red Hat Enterprise Linux 5
cyrus-imapd
Out of support scope
Red Hat Enterprise Linux 6
cyrus-imapd
Out of support scope
Red Hat Enterprise Linux 7
cyrus-imapd
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | cyrus-imapd-0:3.0.7-19.el8 | Fixed | RHSA-2020:4655 |
| Red Hat Enterprise Linux 5 | cyrus-imapd | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | cyrus-imapd | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | cyrus-imapd | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
This flaw can be mitigated by: 1. In cyrus-imapd >= 2.5 disable anysievefolder (it is disabled by default) 2. In cyrus-imapd >=3.0 disable sieve_extensions
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:S/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.65% (0.01655) | 75.71th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.65% (0.01655) | 73.44th | v5 (v2026.06.15) |
| Oct 1, 2025 | 1.35% (0.01349) | 79.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.31% (0.00311) | 52.13th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.23% (0.00229) | 61.99th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.12% (0.00117) | 45.42th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00107) | 41.75th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 18.12% (0.18119) | 93.46th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.85% (0.07855) | 85.01th | v1 |
| Jan 6, 2022 | 7.85% (0.07855) | 84.84th | v1 |
| Jan 5, 2022 | 1.86% (0.01865) | 76.93th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.86% (0.01865) | 0.00th | v1 |
References (12)
- https://access.redhat.com/security/cve/CVE-2019-19783 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1786756 Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGOO5UGEBBDPN7B2YXLK7I7L3Y35EBA/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2019-19783
- https://seclists.org/bugtraq/2019/Dec/38 mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202006-23 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/4566-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-19783
- https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html x_refsource_MISCPatchRelease NotesVendor Advisory
- https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html x_refsource_MISCPatchRelease NotesVendor Advisory
- https://www.debian.org/security/2019/dsa-4590 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.