Zend-Navigation vulnerable to Cross-site Scripting
Many Zend Framework 2 view helpers were using the `escapeHtml()` view helper in order to escape HTML attributes, instead of the more appropriate `escapeHtmlAttr()`. In situations where user data and/or JavaScript is used to seed attributes, this can lead to potential cross site scripting (XSS) attack vectors.
Vulnerable view helpers include:
- All `Zend\Form` view helpers.
- Most `Zend\Navigation` (aka `Zend\View\Helper\Navigation\*`) view helpers.
- All "HTML Element" view helpers: `htmlFlash()`, `htmlPage()`, `htmlQuickTime()`.
- `Zend\View\Helper\Gravatar`