CVE-2023-6629

6.1 MEDIUM
Published: January 03, 2024 Modified: April 08, 2026
View on NVD

Description

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘msg’ parameter in all versions up to, and including, 2.8.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. CVE-2023-6621 appears to be a duplicate of this issue. CVE-2024-29128 appears to be a duplicate of this issue.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://plugins.trac.wordpress.org/browser/post-smtp/trunk/Postman/Wizard/NewWizard.php#L396
Source: security@wordfence.com
Issue Tracking
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3012318%40post-smtp%2Ftrunk&old=3006604%40post-smtp%2Ftrunk&sfp_email=&sfph_mail=#file4
Source: security@wordfence.com
Patch
https://www.wordfence.com/threat-intel/vulnerabilities/id/7681f984-d488-4da7-afe1-988e5ad012f2?source=cve
Source: security@wordfence.com
Third Party Advisory
https://plugins.trac.wordpress.org/browser/post-smtp/trunk/Postman/Wizard/NewWizard.php#L396
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3012318%40post-smtp%2Ftrunk&old=3006604%40post-smtp%2Ftrunk&sfp_email=&sfph_mail=#file4
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
https://www.wordfence.com/threat-intel/vulnerabilities/id/7681f984-d488-4da7-afe1-988e5ad012f2?source=cve
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.1 / 10.0
EPSS (Exploit Probability)
0.5%
66th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-79 CWE-79

Affected Vendors

wpexperts

Related CVEs

CVE-2026-5965 9.8
CVE-2026-6675 5.3
CVE-2026-6674 6.5
CVE-2026-40497 8.1
CVE-2026-6058 4.5