CVE-2026-1043

Description

The PostmarkApp Email Integrator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin settings in versions up to, and including, 2.4. This is due to insufficient input sanitization and output escaping on the pma_api_key and pma_sender_address parameters. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the settings page.

PUBLISHED Reserved 2026-01-16 | Published 2026-02-19 | Updated 2026-02-19 | Assigner Wordfence

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Timeline

Credits

Bhumividh Treloges finder

References

www.wordfence.com/...-6660-483a-9150-e6075b7bffbd?source=cve

plugins.trac.wordpress.org/...tegrator/trunk/postmarkapp.php

plugins.trac.wordpress.org/...rator/tags/2.4/postmarkapp.php

plugins.trac.wordpress.org/...tegrator/trunk/postmarkapp.php

plugins.trac.wordpress.org/...tegrator/trunk/postmarkapp.php

cve.org (CVE-2026-1043)

nvd.nist.gov (CVE-2026-1043)

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