XSS Injection Campaign Exploits WordPress AMP Plugin

News broke last week disclosing a number of vulnerabilities in the AMP For WP plugin, installed on over 100,000 WordPress sites. WordPress contributor Sybre Waaijer identified the security issue and confidentially disclosed it to the WordPress plugins team. To exploit the flaw, an attacker needs to have a minimum of subscriber-level access on a vulnerable site. This…

Ninja Forms Security Updates: What You Need To Know

Yesterday, the popular WordPress plugin Ninja Forms released version 3.3.14, which disclosed and patched two security issues present in the plugin. Upon review of these issues we’ve determined their severity to be moderately low, however due to the plugin’s wide userbase of more than a million active installs we’ve elected to provide a detailed exploration…

Stored Cross-Site Scripting Vulnerability in WordPress 4.8.1

During regular research audits for our Sucuri Firewall (WAF), we discovered a source-based stored Cross-Site Scripting (XSS) vulnerability affecting WordPress 4.8.1. Are You at Risk? The vulnerability requires an account on the victim’s site with the Contributor role – or any account in a WordPress installation with bbPress plugin, as long as it has posting…

Stored XSS in WordPress Core

As you might remember, we recently blogged about a critical Content Injection Vulnerability in WordPress which allowed attackers to deface vulnerable websites. While our original disclosure only described one vulnerability, we actually reported two to the WordPress team. As it turns out, it was possible to leverage the content injection issue to achieve a stored cross-site scripting attack. This issue…