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CVE-2023-6875

POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.8.7 - Authorization Bypass via type connect-app API

Published: Jan 11, 2024Updated: Jun 4, 2025 Sources: CVE List NVD BDUCWE-862
9.8CRITICAL
NVD MITRE
EPSS Score
90.3%
Top 0.2%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

Description

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a type juggling issue on the connect-app REST endpoint in all versions up to, and including, 2.8.7. This makes it possible for unauthenticated attackers to reset the API key used to authenticate to the mailer and view logs, including password reset emails, allowing site takeover.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-862

Affected Products

WordPress Foundation
oss-project·US
POST SMTP Mailer
Web & CMS Plugins
wpexperts
commercialaka wpexperts wp plugins, wp multi store locator, mycred, post smtp
post smtpOn-prem
Web & CMS Plugins / wordpress-plugin
saadiqbal
individual-devaka post smtp – complete email deliverability and smtp solution with email logs, alerts, backup smtp & mobile app, advanced file manager – ultimate file manager for wordpress and document library solution, points management system for gamification, ranks, badges, and loyalty rewards program – mycred
Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile AppMixed
Web & CMS Plugins / wordpress-plugin

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

http://packetstormsecurity.com/files/176525/WordPress-POST-SMTP-Mailer-2.8.7-Authorization-Bypass-Cross-Site-Scripting.html&#13;
packetstormsecurity.com
https://plugins.trac.wordpress.org/browser/post-smtp/trunk/Postman/Mobile/includes/rest-api/v1/rest-api.php#L60&#13;
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3016051/post-smtp/trunk?contextall=1&amp;old=3012318&amp;old_path=%2Fpost-smtp%2Ftrunk&#13;
plugins.trac.wordpress.org
and 8 more references View all →

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