CVE-2026-4379
Stored XSS in LightPress Lightbox WordPress Plugin
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 |
|---|---|---|
| lightpress | lightbox | to 2.3.4 (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 Contributor-level access to inject arbitrary web scripts via Stored Cross-Site Scripting (XSS) in the LightPress Lightbox plugin for WordPress. This can lead to unauthorized script execution when users access the injected pages.
Such unauthorized script execution can result in data exposure or manipulation, potentially compromising user data confidentiality and integrity.
Therefore, this vulnerability could negatively impact compliance with data protection regulations like GDPR and HIPAA, which require safeguarding personal and sensitive data against unauthorized access and breaches.
Can you explain this vulnerability to me?
The LightPress Lightbox plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in its gallery shortcode. Specifically, the vulnerability arises because the plugin includes the value of the `group` attribute in the `[gallery]` shortcode output without properly escaping it. This allows attackers who have Contributor-level access or higher to inject malicious scripts into pages. These scripts then execute whenever any user views the infected page.
How can this vulnerability impact me? :
This vulnerability can allow an authenticated attacker with Contributor-level access or above to inject arbitrary malicious scripts into WordPress 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. Because the vulnerability is stored, the malicious code persists and affects all users who access the compromised content.