Knowing which is the right CMS is key when launching a new site. Websites are no longer just online brochures; they’ re where businesses sell products, protect private information, chat with customers, and build their entire online brand. A good CMS gives you flexibility, room to grow, and strong…
Sucuri
How to Fix the “Deceptive Site Ahead” Warning
Did you just try to access your site and encounter a Deceptive Site Ahead warning? This error message occurs when the browser believes your website is unsafe and experiencing security issues — and it can seriously affect your traffic and reputation. When this warning appears on your site, …
Vulnerability & Patch Roundup — August 2025
Vulnerability reports and responsible disclosures are essential for website security awareness and education. Automated attacks targeting known software vulnerabilities are one of the leading causes of website compromises. To help educate website owners about potential threats to their environments, we’ve compiled a list of important security updates and…
What is Phishing?
Phishing is a serious threat to any industry. We have seen this topic appear in the news more each day. You might have already received a fraudulent email from what seemed to be your bank or even seen the hacking that took place during the 2016 US presidential election….
Locking Down the WordPress Login Page
Due to its flexibility, ease of use, and massive plugin ecosystem, WordPress is a favorite among bloggers, developers, and businesses alike. Given its popularity, attackers do not waste time guessing where sensitive assets live. By default, on every WordPress site the front door is conveniently labeled /wp‐login.php or…
How to Make Your Website GDPR Compliant
There is a straightforward reason GDPR keeps legal teams awake at night: fines can reach £17, 500, 000 or 4% of global annual revenue, whichever is higher. Across the incident reports studied over the past few years, the businesses that took the largest reputational hits weren’t the ones that suffered…
Malicious JavaScript Injects Fullscreen Iframe On a WordPress Website
Last month, we came across an ongoing JavaScript-based malware campaign affecting compromised websites. The malware injects a fullscreen iframe that silently loads content from a suspicious external domain. This type of malicious script aims to force users to view unsolicited content, often for ad fraud, traffic generation, or…
Understanding SQL Injection and How to Prevent Attacks
SQL injection, also known as SQLi, is a technique that targets websites and apps using SQL databases. It works by inserting SQL code into a website’ s input fields to gain access to sensitive information, including customer records, intellectual property, and personal data. Any app (web, desktop, or mobile)…
SEO Spam Removal: Protect Search Rankings Before Blocklists Do
SEO spam used to be just annoying, but now it’ s a huge moneymaker for organized crime. These groups are pushing fake meds, illegal gambling, and malware. The second they find a weak spot, they sneak in hidden links, crank out fake pages, and then disappear. You’ re left with…
WordPress Vulnerability & Patch Roundup — July 2025
Vulnerability reports and responsible disclosures are essential for website security awareness and education. Automated attacks targeting known software vulnerabilities are one of the leading causes of website compromises. To help educate website owners about potential threats to their environments, we’ve compiled a list of important security updates and…
Why Your Website Might Be Throwing a 421 SNI Error (And What to Do About It)
So, your support team is suddenly flooded with tickets about “421 Misdirected Request” errors, and you’ re wondering if the internet is just having a bad day. Spoiler: it’s not. But Apache might be. Let’s break down what’s going on, why it’s happening now, and how to fix it—whether…
Unauthorized Admin User Created via Disguised WordPress Plugin
Recently at Sucuri, we investigated a malware case reported by one of our clients. Their WordPress site was compromised, and the attacker had installed a fake plugin. Upon analysis revealed that it was a sophisticated backdoor plugin designed to create a persistent and hidden administrator account. What Did…
Uncovering a Stealthy WordPress Backdoor in mu-plugins
Recently, our team uncovered a particularly sneaky piece of malware tucked away in a place many WordPress users don’ t even know exists: the mu-plugins folder. In fact, back in March, we saw a similar trend with hidden malware in this very directory, as detailed in our post Hidden…
Product Update – New Backups Platform
Sucuri is pleased to announce the completion of a product upgrade with our new Backups platform. For those already subscribed to our Backups platform, you will begin to see (over the next week or so), a new destination for where to access your new Backups. For those who…
WordPress Redirect Malware Hidden in Google Tag Manager Code
Last month, a customer contacted us after noticing their WordPress website was unexpectedly redirecting to a spam domain. The redirection occurred approximately 4-5 seconds after a user landed on the site. Upon closer inspection of the site’s source code we found a suspicious Google Tag Manager loading. This…
Stealthy PHP Malware Uses ZIP Archive to Redirect WordPress Visitors
Last month, a customer contacted us, concerned about persistent and inexplicable redirects on their WordPress website. Our investigation quickly unearthed a sophisticated piece of malware deeply embedded within their site’ s core files. This wasn’ t just a simple redirect; it was a complex operation designed for search engine poisoning…
Attackers Inject Code into WordPress Theme to Redirect Visitors
In a recent article we discussed some of the reasons sites are frequently attacked. That article covered browser redirects, and we’ll explore an example of such a case here. Website themes are a common attack vector for many reasons. The theme is guaranteed to load on every page, …
Fake Spam Plugin Uses Victim’s Domain Name to Evade Detection
During our investigation of an SEO spam infection (spam content designed to manipulate search engine results), we discovered a nicely crafted plugin that named itself after the infected domain, helping it evade detection. While this tactic was simple, it easily blended in with other legitimate plugins, making it…
Vulnerability & Patch Roundup — June 2025
Vulnerability reports and responsible disclosures are essential for website security awareness and education. Automated attacks targeting known software vulnerabilities are one of the leading causes of website compromises. To help educate website owners about potential threats to their environments, we’ve compiled a list of important security updates and…
Stealthy WordPress Malware Drops Windows Trojan via PHP Backdoor
Last month, we encountered a particularly interesting and complex malware case that stood out from the usual infections we see in compromised WordPress websites. At first glance, the site looked clean, no visible signs of defacement, no malicious redirects, and nothing suspicious in the plugin list. But beneath…
