CVE-2026-5711
Stored XSS in Post Blocks & Tools WordPress Plugin Allows Script Injection
Publication date: 2026-04-08
Last updated on: 2026-04-08
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| post_blocks_tools | plugin | to 1.3.0 (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
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability allows authenticated attackers with author-level access to inject arbitrary web scripts via stored cross-site scripting (XSS). This can lead to unauthorized access or manipulation of user data when users access the injected pages.
Such unauthorized data access or manipulation could potentially violate data protection requirements under standards like GDPR or HIPAA, which mandate safeguarding personal and sensitive information against unauthorized access or disclosure.
However, the provided information does not explicitly detail the impact on compliance with these regulations.
Can you explain this vulnerability to me?
The Post Blocks & Tools plugin for WordPress has a vulnerability known as Stored Cross-Site Scripting (XSS) in its Posts Slider block. This occurs because the plugin does not properly sanitize or escape user input in the 'sliderStyle' block attribute. As a result, authenticated users with author-level access or higher can inject malicious scripts into pages. These scripts then execute whenever any user views the affected page.
How can this vulnerability impact me? :
This vulnerability allows attackers with author-level access to inject malicious scripts into web pages. These scripts can execute in the browsers of users who visit the infected pages, potentially leading to theft of sensitive information, session hijacking, defacement, or other malicious actions. Since the attack requires authenticated access, it could be exploited by insiders or compromised accounts.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should update the Post Blocks & Tools plugin for WordPress to a version later than 1.3.0 where the issue is fixed.
Additionally, restrict author-level access and above to trusted users only, as the vulnerability requires authenticated users with author-level permissions or higher to exploit.
Monitor and sanitize user inputs on the 'sliderStyle' block attribute in the Posts Slider block to prevent injection of arbitrary scripts.