CVE-2023-7027: 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 versi

high Affects post-smtp (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

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 versi

Package
post-smtp (WordPress plugin) WordPress
Affected versions
<2.8.8
Fixed in
2.8.8
Severity
high  CVSS 7.2
Exploitation
not on CISA KEV · EPSS 1% (60.9th percentile)
Published
2024-01-03
Source
nvd

References

CWE-79
NVD recordpost-smtp (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs   How findings are ranked

Related advisories