CVE-2026-3498
Stored XSS in BlockArt Blocks WordPress Plugin
Publication date: 2026-04-11
Last updated on: 2026-04-11
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| blockart | blocks | to 2.2.15 (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 BlockArt Blocks plugin for WordPress has a vulnerability known as Stored Cross-Site Scripting (XSS) in the 'clientId' block attribute in all versions up to and including 2.2.15.
This vulnerability exists because the plugin does not properly sanitize input or escape output, allowing attackers to inject malicious web scripts.
Authenticated users with Author-level access or higher can exploit this to insert arbitrary scripts into pages, which then execute whenever any user views those pages.
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 to user data or session hijacking, potentially compromising confidentiality and integrity of data.
Such security weaknesses can impact compliance with standards like GDPR and HIPAA, which require protection of personal and sensitive information against unauthorized access and data breaches.
However, the provided information does not explicitly state the direct effects on compliance with these regulations.
How can this vulnerability impact me? :
This vulnerability can lead to the execution of malicious scripts in the context of the affected website.
- Attackers with Author-level access can inject scripts that run for any user visiting the infected page.
- Potential impacts include theft of user credentials, session hijacking, defacement, or unauthorized actions performed on behalf of users.
- Since the vulnerability requires authenticated access, the risk is limited to users with certain privileges, but the impact on confidentiality and integrity is significant.