mutt: Remote Code Execution via backquote characters
Published Jul 17, 2018
9.8
CRITICALCVSS 3.1
EPSS 4.95%
Description
An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They allow remote IMAP servers to execute arbitrary commands via backquote characters, related to the mailboxes command associated with an automatic subscription.
Affected products
No data.
Configuration 2
- 14.04
- 16.04
- 18.04
Configuration 3
- 8.0
- 9.0
Configuration 4
- 6.0
- 7.0
- 6.0
- 7.0
- 7.6
- 7.7
- 7.5
- 7.6
- 7.7
- 7.6
- 7.7
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 6
mutt-5:1.5.20-9.20091214hg736b6a.el6
Fixed · RHSA-2018:2526
Red Hat Enterprise Linux 7
mutt-5:1.5.21-28.el7_5
Fixed · RHSA-2018:2526
Red Hat Enterprise Linux 5
mutt
Will not fix
Red Hat Enterprise Linux 8
mutt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | mutt-5:1.5.20-9.20091214hg736b6a.el6 | Fixed | RHSA-2018:2526 |
| Red Hat Enterprise Linux 7 | mutt-5:1.5.21-28.el7_5 | Fixed | RHSA-2018:2526 |
| Red Hat Enterprise Linux 5 | mutt | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | mutt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
AV:N/AC:L/Au:N/C:P/I:P/A:P
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 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.95% (0.04954) | 91.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.86% (0.04860) | 90.87th | v5 (v2026.06.15) |
| Nov 21, 2025 | 2.97% (0.02975) | 86.02th | v4 (v2025.03.14) |
| Nov 18, 2025 | 14.50% (0.14504) | 93.83th | v4 (v2025.03.14) |
| Oct 13, 2025 | 2.97% (0.02975) | 85.94th | v4 (v2025.03.14) |
| Sep 23, 2025 | 4.04% (0.04035) | 88.06th | v4 (v2025.03.14) |
| Jul 12, 2025 | 2.28% (0.02283) | 84.01th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.50% (0.04504) | 88.09th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.64% (0.06638) | 84.95th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.50% (0.04504) | 88.39th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.01% (0.01012) | 84.39th | v3 (v2023.03.01) |
| Feb 10, 2024 | 1.09% (0.01090) | 83.91th | v3 (v2023.03.01) |
| Dec 8, 2023 | 1.39% (0.01386) | 84.82th | v3 (v2023.03.01) |
| Jul 15, 2023 | 1.19% (0.01186) | 83.23th | v3 (v2023.03.01) |
| Jul 11, 2023 | 1.55% (0.01551) | 85.39th | v3 (v2023.03.01) |
| May 8, 2023 | 1.26% (0.01258) | 83.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.96% (0.00961) | 80.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.94% (0.03937) | 72.91th | v1 |
| Jan 6, 2022 | 3.94% (0.03937) | 72.67th | v1 |
| Sep 1, 2021 | 3.94% (0.03937) | 83.13th | v1 |
| Apr 14, 2021 | 3.94% (0.03937) | 0.00th | v1 |
References (14)
- http://www.mutt.org/news.html x_refsource_MISCRelease NotesVendor Advisory
- https://access.redhat.com/errata/RHSA-2018:2526 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-14357 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1602915 Issue Tracking
- https://github.com/neomutt/neomutt/commit/e52393740334443ae0206cab2d7caef381646725 x_refsource_MISCPatchThird Party Advisory
- https://gitlab.com/muttmua/mutt/commit/185152818541f5cdc059cbff3f3e8b654fc27c1d x_refsource_MISCPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/08/msg00001.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://neomutt.org/2018/07/16/release x_refsource_MISCRelease NotesVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-14357
- https://security.gentoo.org/glsa/201810-07 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3719-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3719-3/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-14357
- https://www.debian.org/security/2018/dsa-4277 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.