CVE-2026-4059
Stored XSS in ShopLentor Plugin via shortcode attribute
Publication date: 2026-04-14
Last updated on: 2026-04-14
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| defiant | shoplentor | to 3.3.5 (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 ShopLentor plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in the woolentor_quickview_button shortcode's button_text attribute. This vulnerability exists in all versions up to and including 3.3.5 due to insufficient input sanitization and missing output escaping on user-supplied shortcode attributes.
Authenticated attackers with Contributor-level access or higher can exploit this vulnerability to inject arbitrary web scripts into pages. These scripts will execute whenever any user accesses the injected page.
How can this vulnerability impact me? :
This vulnerability allows attackers with Contributor-level access or above to inject malicious scripts into web pages. These scripts can execute in the context of users visiting the affected pages, potentially leading to unauthorized actions, data theft, or session hijacking.
Because the vulnerability is a Stored Cross-Site Scripting issue, the malicious code persists on the site and affects all users who view the compromised pages.
The CVSS score of 6.4 indicates a medium severity impact, with low attack complexity but requiring some privileges.
What immediate steps should I take to mitigate this vulnerability?
The vulnerability exists in the ShopLentor plugin for WordPress versions up to and including 3.3.5 due to insufficient input sanitization and missing output escaping on the woolentor_quickview_button shortcode's button_text attribute.
To mitigate this vulnerability immediately, update the ShopLentor plugin to a version later than 3.3.5 where the issue is fixed.
Additionally, restrict Contributor-level and above users from injecting untrusted content until the update is applied.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability allows authenticated attackers with Contributor-level access and above to inject arbitrary web scripts via stored cross-site scripting (XSS). This can lead to unauthorized access to user data or session hijacking, which may compromise the confidentiality and integrity of personal data.
Such a compromise could potentially violate data protection regulations like GDPR and HIPAA, which require adequate protection of personal data against unauthorized access and attacks.
However, the provided information does not explicitly state the impact on compliance with these standards.