CVE-2026-57369 in Themify Builder Plugin
Summary
by MITRE • 07/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in themifyme Themify Builder themify-builder allows Reflected XSS.This issue affects Themify Builder: from n/a through <= 7.7.4.
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Analysis
by VulDB Data Team • 07/13/2026
This cross-site scripting vulnerability exists within the themifyme Themify Builder plugin for WordPress, specifically affecting versions up to and including 7.7.4. The flaw represents a classic reflected xss attack vector where malicious input is not properly sanitized during web page generation, allowing attackers to inject arbitrary javascript code into web pages viewed by other users. The vulnerability stems from insufficient input validation and output encoding mechanisms within the plugin's core functionality.
The technical implementation of this weakness aligns with CWE-79 which defines cross-site scripting as a condition where an application includes untrusted data in new web page content without proper validation or escaping. In this case, the Themify Builder plugin fails to adequately neutralize user-supplied input that gets reflected back to users through the generated web pages. Attackers can exploit this by crafting malicious payloads that when executed in a victim's browser can steal session cookies, perform unauthorized actions, or redirect users to malicious sites.
The operational impact of this vulnerability extends beyond simple data theft as it provides attackers with persistent access to compromised user sessions and potentially full administrative control over affected WordPress installations. When users visit pages containing the reflected malicious input, their browsers execute the injected javascript code, enabling attackers to manipulate the victim's browsing experience or harvest sensitive information. This vulnerability is particularly dangerous in environments where administrators frequently access the plugin interface or where multiple users interact with the same vulnerable pages.
Mitigation strategies should focus on immediate patching of the affected plugin versions to the latest secure release which addresses the input sanitization issues. Additionally implementing content security policies can help prevent execution of unauthorized scripts even if the vulnerability is exploited. Regular security auditing of third-party plugins and maintaining updated wordpress core installations are essential defensive measures. Organizations should also consider network-based solutions such as web application firewalls that can detect and block known xss attack patterns targeting this specific vulnerability class. The ATT&CK framework categorizes this as a web application attack vector under the technique of code injection where adversaries leverage input validation weaknesses to execute malicious code in user browsers, making it critical to address through both defensive and reactive security controls.