CVE-2026-8844
Stored XSS in Responsive Check WordPress Plugin
Publication date: 2026-05-27
Last updated on: 2026-05-27
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| wordfence | responsive_check | to 0.0.3 (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 Responsive Check plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in versions up to and including 0.0.3. This occurs because the plugin does not properly sanitize or escape input provided to the 'rspcheck' shortcode, specifically the 'url' and 'button' attributes. These attributes are directly inserted into iframe src attributes without using proper escaping functions like esc_attr() or esc_url(). As a result, authenticated users with contributor-level access or higher can inject malicious scripts that execute whenever someone views the affected page.
How can this vulnerability impact me? :
This vulnerability allows attackers with contributor-level access or above to inject arbitrary web scripts into pages. These scripts execute in the context of users who visit the infected pages, potentially leading to theft of sensitive information, session hijacking, or other malicious actions. Because the attack is stored, the malicious code persists and affects all users who access the compromised content.