CVE-2023-7027

POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.8.7 - Unauthenticated Stored Cross-Site Scripting via device

MEDIUM
5.4
CVSS Score
Published: January 3, 2024 at 04:29 AM UTC
Updated: June 17, 2026 at 06:51 AM UTC
2 products affected across 2 vendorsPost SMTPPost SMTP

Using POST SMTP – The #1 WordPress SMTP Plugin with Advanced Email Logging and Delivery Failure Notifications by wpexpertsio?

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

Description

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘device’ header in all versions up to, and including, 2.8.7 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Post SMTP· Wpexpertswordpress-plugin
95%
v < 2.8.8
Affected range stops below 2.8.8, so it looks safe — our inference, not a vendor statement
Post SMTP· Saadiqbalwordpress-plugin
60%
v ≤ 2.8.7

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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