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CVE-2023-4875

20
FAUCET Score

CVE-2023-4875 is a medium-severity null pointer dereference vulnerability affecting Mutt versions greater than 1.5.2 and less than 2.2.12, including Debian distributions. An authenticated attacker could trigger a denial of service by enticing a user to compose a message from a specially crafted draft, requiring user interaction. While the CVSS score is 5.7, indicating a potential for high availability impact, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

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

2.2LOW

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
0.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0051 is in the 62nd percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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 0.0 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-2023-4875Moderate

Undefined Behavior for Input to API in Mutt

Sep 12, 2023
redhatCVE-2023-4875Moderate

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
Patch
gitlab.com / muttmua/mutt/-/commit/4cc3128abdf52c615911589394a03271fddeefc6.patch
Patch