PT-2026-20632 · WordPress · Postmarkapp Email Integrator

Bhumividh Treloges · Published 2026-02-19 · Updated 2026-02-19 · CVE-2026-1043

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions PostmarkApp Email Integrator plugin for WordPress versions up to and including 2.4

Description The PostmarkApp Email Integrator plugin for WordPress is susceptible to Stored Cross-Site Scripting. This is caused by inadequate input sanitization and output escaping of the pma api key and pma sender address parameters within the plugin settings. An authenticated attacker with Administrator-level access or higher can inject malicious web scripts that execute when users access the settings page.

Recommendations Update the PostmarkApp Email Integrator plugin to a version newer than 2.4.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-1043

Affected Products

Postmarkapp Email Integrator

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-1043 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/80b03e81-6660-483a-9150-e6075b7bffbd?source=cve · Note
• https://twitter.com/CVEnew/status/2024501283613487603 · Twitter Post
• https://plugins.trac.wordpress.org/browser/postmarkapp-email-integrator/trunk/postmarkapp.php#L68 · Note
• https://plugins.trac.wordpress.org/browser/postmarkapp-email-integrator/trunk/postmarkapp.php#L149 · Note
• https://plugins.trac.wordpress.org/browser/postmarkapp-email-integrator/tags/2.4/postmarkapp.php#L149 · Note
• https://plugins.trac.wordpress.org/browser/postmarkapp-email-integrator/trunk/postmarkapp.php#L153 · Note