Description
The character encoding (charset) of this page is dirrectly controlled by user input. The charset can be specified in the Content-Type header or in a meta tag declaration. If an attacker can control the response charset, they could manipulate the HTML to perform XSS or other attacks.
Remediation
It's recommended to force UTF-8 in charset declarations. If the user must control the charset, make sure you are using a whitelist of accepted charsets.
References
Related Vulnerabilities
WordPress Plugin Titan Framework Cross-Site Scripting (1.7.5)
WordPress Plugin WP Super Cache Cross-Site Scripting (1.4.2)
WordPress Plugin PickPlugins Product Slider for WooCommerce Cross-Site Scripting (1.13.21)
WordPress Plugin 123devis-affiliation Cross-Site Scripting (1.0.4)
WordPress Plugin Banner Effect Header Cross-Site Scripting (1.2.7)