CVE-2026-3554
Stored XSS in Sherk Custom Post Type Displays WordPress Plugin
Publication date: 2026-03-21
Last updated on: 2026-03-21
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| sherk_custom_post_type_displays | sherk_custom_post_type_displays | to 1.2.1 (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 Sherk Custom Post Type Displays plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in its 'title' shortcode attribute in all versions up to and including 1.2.1.
This vulnerability occurs because the plugin does not properly sanitize or escape the input provided in the 'title' attribute of the 'sherkcptdisplays' shortcode.
Specifically, the 'title' attribute value is taken directly from user input and inserted into an HTML <h2> tag without escaping, allowing an attacker with Contributor-level access or higher to inject malicious scripts.
These scripts then execute whenever any user views the affected page, potentially compromising user data or site integrity.
How can this vulnerability impact me? :
This vulnerability allows authenticated attackers with Contributor-level access or higher to inject arbitrary malicious scripts into pages.
When other users visit these pages, the injected scripts execute in their browsers, which can lead to theft of sensitive information, session hijacking, or unauthorized actions performed on behalf of the user.
Because the attack is stored, the malicious code persists on the site and affects all visitors to the compromised pages.
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