FluentSMTP <= 2.2.4 - Unauthenticated Stored Cross-Site Scripting via Email Subject

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2023-3087
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-07-12 05:15:09 UTC
Updated2026-04-08 19:18:21 UTC
DescriptionThe FluentSMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via an email subject in versions up to, and including, 2.2.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

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

EPSS: 0.008190000 probability, percentile 0.743830000 (date 2026-04-09)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Wpmanageninja Fluentsmtp All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Techjewel FluentSMTP WP SMTP Plugin With Amazon SES SendGrid MailGun Postmark Google And Any SMTP Provider affected 2.2.4 semver Not specified

References

ReferenceSourceLinkTags
403 Forbidden af854a3a-2127-422b-91ae-364da2661108 plugins.trac.wordpress.org Patch
FluentSMTP <= 2.2.4 - Unauthenticated Stored Cross-Site Scripting via Email Subject af854a3a-2127-422b-91ae-364da2661108 www.wordfence.com Third Party Advisory
403 Forbidden af854a3a-2127-422b-91ae-364da2661108 plugins.trac.wordpress.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Alex Thomas (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-06-03T00:00:00.000ZDiscovered
CNA2023-06-05T00:00:00.000ZVendor Notified
CNA2023-07-06T00:00:00.000ZDisclosed
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