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CVE-2023-51747

SMTP smuggling in Apache James

Published: Feb 27, 2024Updated: May 5, 2025 Sources: CVE List NVD GHSACWE-20
7.1HIGH
NVD MITRE
EPSS Score
1.0%
Top 39.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-20CWE-290CWE-444

Affected Products

Apache Software Foundation
oss-project·USaka apache foundation
Apache James serverOn-prem
Communications / email-server-client
Maven
package-ecosystem
org.apache.james:james-server
OSS Libraries
apache
oss-project·USaka apache http server, apache httpd
jamesOn-premWeb App
Web & CMS Plugins

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques
Collection
Initial Access
View detailed technique mapping

References

https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
sec-consult.com
https://postfix.org/smtp-smuggling.html
postfix.org
https://lists.apache.org/thread/rxkwbkh9vgbl9rzx1fkllyk3krhgydko
lists.apache.org
and 6 more references View all →

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