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CVE-2023-4874

23
FAUCET Score

CVE-2023-4874 describes a null pointer dereference vulnerability in Mutt versions greater than 1.5.2 and less than 2.2.12, affecting Debian Linux distributions. This flaw can be triggered by viewing a specially crafted email, leading to a denial of service (high availability impact). The vulnerability has a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low attack complexity, requiring user interaction. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.5.2, < 2.2.12CPE match
cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*
> 1.5.2, < 2.2.12CPE matchmatch criteria
cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 56th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

microsoftpatch availablevia msrc
Product: 18316-16823Fixed in: 2.2.12-1
microsoftpatch availablevia msrc
Product: cbl2 mutt 2.2.12-1 on CBL Mariner 2.0Fixed in: 2.2.12-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: mutt-5:2.0.7-3.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: mutt-5:2.2.6-2.el9
View patch

Vendor Advisories (2)

microsoft2023-Sep/CVE-2023-4874Moderate

Undefined Behavior for Input to API in Mutt

Sep 12, 2023
redhatCVE-2023-4874Moderate

mutt: null pointer dereference

Sep 9, 2023

References

lists.debian.org / debian-lts-announce/2023/09/msg00021.html
debian.org / security/2023/dsa-5494
openwall.com / lists/oss-security/2023/09/26/6
gitlab.com / muttmua/mutt/-/commit/452ee330e094bfc7c9a68555e5152b1826534555.patch
Vendor Advisory
gitlab.com / muttmua/mutt/-/commit/a4752eb0ae0a521eec02e59e51ae5daedf74fda0.patch
Vendor Advisory