CVE-2026-1043
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Stored XSS in PostmarkApp Email Integrator Plugin Settings

Publication date: 2026-02-19

Last updated on: 2026-02-19

Assigner: Wordfence

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.
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Meta Information
Published
2026-02-19
Last Modified
2026-02-19
Generated
2026-06-16
AI Q&A
2026-02-19
EPSS Evaluated
2026-06-14
NVD
CVE-2026-1043
EUVD
EUVD-2026-8220
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
postmarkapp email_integrator to 2.4 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

The PostmarkApp Email Integrator plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in versions up to and including 2.4. This vulnerability arises because the plugin does not properly sanitize or escape input on the pma_api_key and pma_sender_address settings parameters.

An attacker with Administrator-level access or higher can inject malicious web scripts into the plugin's settings page. These scripts will then execute whenever any user accesses that settings page.

Impact Analysis

This vulnerability allows an authenticated administrator or higher to inject malicious scripts that execute in the context of the WordPress site.

The impact includes potential theft of sensitive information, session hijacking, or other malicious actions performed on behalf of users who visit the affected settings page.

Because the vulnerability requires high privileges and user interaction with the settings page, the overall risk is moderate, but it can still lead to compromise of confidentiality and integrity.

Compliance Impact

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