CVE-2026-1043
Stored XSS in PostmarkApp Email Integrator Plugin Settings
Publication date: 2026-02-19
Last updated on: 2026-02-19
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| postmarkapp | email_integrator | to 2.4 (inc) |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know