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CVE-2023-51747

HIGH
Published 2024-02-27T13:08:01.807Z
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CVSS Score

V3.1
7.1
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.403
Higher than 40.3% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
LOW
Integrity
HIGH
Availability
NONE

Description

Apache James prior to versions 3.8.1 and 3.7.5 is vulnerable to SMTP smuggling.

A lenient behaviour in line delimiter handling might create a difference of interpretation between the sender and the receiver which can be exploited by an attacker to forge an SMTP envelop, allowing for instance to bypass SPF checks.

The patch implies enforcement of CRLF as a line delimiter as part of the DATA transaction.

We recommend James users to upgrade to non vulnerable versions.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Apache Software Foundation

Apache James server

Affected Versions:

0 3.8

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed HIGH

SMTP smuggling in Apache James

GHSA-p5q9-86w4-2xr5

Advisory Details

Apache James prior to versions 3.8.1 and 3.7.5 is vulnerable to SMTP smuggling. A lenient behaviour in line delimiter handling might create a difference of interpretation between the sender and the receiver which can be exploited by an attacker to forge an SMTP envelop, allowing for instance to bypass SPF checks. The patch implies enforcement of CRLF as a line delimiter as part of the DATA transaction. We recommend James users to upgrade to non vulnerable versions.

Affected Packages

Maven org.apache.james:james-server
ECOSYSTEM: ≥0 <3.7.5
Maven org.apache.james:james-server
ECOSYSTEM: ≥3.8.0 <3.8.1

CVSS Scoring

CVSS Score

7.5

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-51747
WEB https://github.com/apache/james-project/commit/d1ef102540e504c067b6c1721a6f1e7eee9c6fc6
WEB https://github.com/apache/james-project/commit/d5cd8bb098aa78d8d62c9645f3c532689ef1cb03
PACKAGE https://github.com/apache/james-project
WEB https://lists.apache.org/thread/rxkwbkh9vgbl9rzx1fkllyk3krhgydko
WEB https://postfix.org/smtp-smuggling.html
WEB https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide
WEB http://www.openwall.com/lists/oss-security/2024/02/27/4

Advisory provided by GitHub Security Advisory Database. Published: February 27, 2024, Modified: November 13, 2024

References

https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
https://postfix.org/smtp-smuggling.html
https://lists.apache.org/thread/rxkwbkh9vgbl9rzx1fkllyk3krhgydko
http://www.openwall.com/lists/oss-security/2024/02/27/4
Published: 2024-02-27T13:08:01.807Z
Last Modified: 2025-02-13T17:19:50.944Z
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