CVE-2026-1543
Deferred Deferred - Pending Action
Stored XSS in Avada Builder WordPress Plugin

Publication date: 2026-05-21

Last updated on: 2026-05-21

Assigner: Wordfence

Description
The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 3.15.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator) accesses a page displaying dynamic user data (such as via the Dynamic Data feature pulling user biographical information).
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Meta Information
Published
2026-05-21
Last Modified
2026-05-21
Generated
2026-06-10
AI Q&A
2026-05-21
EPSS Evaluated
2026-06-09
NVD
CVE-2026-1543
EUVD
EUVD-2026-31211
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
fusion_builder avada_builder to 3.15.2 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via multiple shortcodes in all versions up to and including 3.15.2. This vulnerability arises due to insufficient input sanitization and output escaping.

Authenticated attackers with Subscriber-level access or higher can exploit this vulnerability to inject arbitrary web scripts into pages. These scripts execute whenever a user, typically an administrator, views a page displaying dynamic user data, such as biographical information pulled by the Dynamic Data feature.

Impact Analysis

This vulnerability can allow attackers with relatively low privileges (Subscriber-level access) to inject malicious scripts that execute in the context of other users, including administrators.

The impact includes potential compromise of user accounts, theft of sensitive information, unauthorized actions performed on behalf of users, and overall degradation of site security and trust.

According to the CVSS v3.1 score, the vulnerability has a base score of 6.4, indicating a medium severity with low attack complexity but requiring privileges and no user interaction.

Mitigation Strategies

The vulnerability exists in all versions of the Avada (Fusion) Builder plugin for WordPress up to and including 3.15.2. To mitigate this vulnerability, you should immediately update the Avada Builder plugin to a version later than 3.15.2 where the issue is fixed.

Additionally, restrict Subscriber-level access and above to trusted users only, as the vulnerability requires authenticated access to exploit.

Compliance Impact

The vulnerability in the Avada (Fusion) Builder plugin allows authenticated attackers with Subscriber-level access to inject arbitrary web scripts that execute when administrators view affected pages. This Stored Cross-Site Scripting (XSS) flaw can lead to unauthorized access or manipulation of user data.

Such unauthorized script execution and potential data exposure can impact compliance with data protection regulations like GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access and ensuring data integrity.

Therefore, this vulnerability could lead to non-compliance with these standards due to the risk of data breaches or unauthorized data manipulation.

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