A new Cloudflare infection has once again been targeting WordPress sites. This new iteration of malware mimics a legitimate-looking Cloudflare verification page, which then tricks victims into following various commands and downloading malware. This style of malware is not new – our researcher Ben Martin wrote about a similar campaign targeting WordPress sites back in […]
Tag Archives: WordPress Security
When Good Software Goes Bad
Most often bad actors try their best to hide their activities by using obfuscated code or by uploading fake plugins or themes that inject simple but malicious scripts into a site. Every now and then we encounter a case where legitimate software is used for malicious purposes. We recently uncovered a case where Sypex Dumper, […]
Ad-Jacked: Cybercriminals Inject Google Adsense into WordPress
Recently, we’ve encountered cases where WordPress websites were impacted by Google Adsense hijackers. Attackers inject advertisements and scripts that steal website resources and pump ad views for their adsense accounts. This is not the first time we’ve seen attackers abusing popular Google services. In a previous case, we discovered a credit card skimmer hiding inside […]
Fake Font Domain Used to Skim Credit Card Data
Recently, a client of ours came to us concerned about credit card theft on their WordPress site. The client’s users reported that their credit card data had become compromised shortly after purchasing products on our client’s website. When investigating the site, two suspicious symptoms appeared: A strange credit card form, and an unfamiliar domain, which […]
Vulnerability & Patch Roundup — March 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 vulnerability patches for the WordPress ecosystem this […]
Hidden Malware Strikes Again: Mu-Plugins Under Attack
At Sucuri, our security researchers continually monitor for new malware variants and infection techniques targeting WordPress websites. Recently, we’ve uncovered multiple cases where threat actors are leveraging the mu-plugins directory to hide malicious code. This approach represents a concerning trend, as the mu-plugins (Must-Use plugins) are not listed in the standard WordPress plugin interface, making […]
Fake Cloudflare Verification Results in LummaStealer Trojan Infections
Today’s blog post will be a follow up to a previous article we posted a few weeks ago: We continue to see new variants of this malware campaign emerge. WordPress websites continue to be used as staging grounds to trick website visitors into running malicious powershell commands on their Windows computers in order to infect […]
Credit Card Skimmer and Backdoor on WordPress E-commerce Site
The battle against e-commerce malware continues to intensify, with attackers deploying increasingly sophisticated tactics. In a recent case at Sucuri, a customer reported suspicious files and unexpected behavior on their WordPress site. Upon deeper analysis, we discovered a complicated infection involving multiple components: a credit card skimmer, a hidden backdoor file manager, and a malicious […]
Cascading Redirects: Unmasking a Multi-Site JavaScript Malware Campaign
During a recent website security investigation, we uncovered a malicious JavaScript injection affecting a WordPress website. The infection was responsible for redirecting visitors to unwanted third-party domains, ultimately harming the site’s reputation and potentially exposing users to further malicious activity. What was discovered? A customer reached out to us, reporting that their website was unexpectedly […]
Vulnerability & Patch Roundup — February 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 vulnerability patches for the WordPress ecosystem this […]
