Over the last few weeks, we’ve noticed a JavaScript injection in a number of WordPress databases, and we recently wrote about them in a Sucuri Labs Note. The campaign attempts to redirect visitors to a bogus Windows support page claiming that their computers are infected with ‘riskware’ and will be disabled unless they call what […]
Tag Archives: WordPress Security
Javascript Injection Creates Rogue WordPress Admin User
Earlier this year, we faced a growing volume of infections related to a vulnerability in outdated versions of the Newspaper and Newsmag themes. The infection type was always the same: malicious JavaScript designed to display unauthorized pop-ups or completely redirect visitors to spammy websites, which the hackers then monetized through advertisement views. This month we […]
Malicious Cryptominers from GitHub
Recently, a webmaster contacted us when his AVG antivirus reported that the JS:Miner-C [Trj] infection was found on their site. Our investigation revealed a hidden iframe had been injected into the theme’s footer.php file: <iframe src="hxxps://wpupdates.github[.]io/ping/” style=”width:0;heigh:0;border:none;”> When we opened the URL in a browser, the page was blank. After checking the HTML source code, […]
Cloudflare[.]Solutions Keylogger on Thousands of Infected WordPress Sites
A few weeks ago, we wrote about a massive WordPress infection that injected an obfuscated script pretending to be jQuery and Google Analytics. In reality, this script loaded a CoinHive cryptocurrency miner from a third-party server. We also mentioned a post written back in April that described the cloudflare.solutions malware, which came along with the cryptominers. […]
Formidable Forms / Shortcodes Ultimate Exploits In The Wild
On Monday, November 20th, we were notified about a vulnerability that poses a serious security risk when the Shortcodes Ultimate and Formidable Forms plugins are used together on a single WordPress installation. Over the past couple of weeks, we’ve noticed a large influx in the number of malicious requests testing for the presence of the […]
SQL Injection in bbPress
During regular audits of our Sucuri Firewall (WAF), one of our researchers at the time, Slavco Mihajloski, discovered an SQL Injection vulnerability affecting bbPress. If the proper conditions are met, this vulnerability is very easy to abuse by any visitors on the victim’s website. Because details about this vulnerability have been made public today on […]
New WordPress Security Guide
WordPress has become the most popular CMS and now powers over 28% of the web. With over 60 million downloads, its popularity makes it a prime target for malicious hackers that are looking for vulnerabilities to exploit. If an attacker is able to gain unauthorized access into an insecure website, they can leverage valuable resources […]
Cryptominers on Hacked Sites – Part 2
Last month we wrote about how the emergence of website cryptocurrency miners resulted in hackers abusing the technology by injecting the CoinHive miners into compromised sites without the consent of the website owners. We reviewed two types of infections that affected WordPress and Magento sites, and have been monitoring the malicious use of the CoinHive […]
Fake Plugins, Fake Security
WordPress users are becoming increasingly more aware of security threats and as a result they are taking more actions to secure their websites (e.g. by installing security plugins). While this is a good thing, there are always black hats trying to take an advantage of new opportunities to compromise websites. For example, we’re seeing a […]
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 […]
