CVE-2026-4081
Stored XSS in ZeM STL WordPress Plugin
Publication date: 2026-06-02
Last updated on: 2026-06-02
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| zem_stl | zem_stl | to 1.0 (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 ZeM STL plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in its [zemstl] shortcode. This occurs because the plugin does not properly sanitize or escape user-supplied shortcode attributes such as 'url', 'color', and 'bgcolor'. These attributes are directly inserted into HTML without using escaping functions like esc_attr(), allowing attackers with Contributor-level access or higher to inject malicious scripts that execute when other users view the affected pages.
How can this vulnerability impact me? :
This vulnerability can allow authenticated attackers with Contributor-level access or above to inject arbitrary malicious scripts into pages. When other users visit these pages, the injected scripts execute in their browsers, potentially leading to theft of user credentials, session hijacking, defacement, or other malicious actions. This compromises the security and integrity of the affected WordPress site and its users.