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Hackers have been actively exploiting a recently patched vulnerability in some websites that causes the sites to redirect to malicious sites or display misleading popups, security researchers warned on Wednesday.
Researchers from security firm Zscaler's ThreatLabZ say attackers are exploiting the vulnerability to cause sites using unpatched versions of WP Live Chat Support to redirect to malicious sites or to display unwanted popups. While the attacks aren't widespread, there have been enough of them to raise concern.
"Cybercriminals actively look for new vulnerabilities in popular content management systems such as WordPress and Drupal, as well as popular plugins that are found in many websites," Zscaler's Prakhar Shrotriya wrote in a post. "An unpatched vulnerability in either the CMS or associated plugins provides an entry point for attackers to compromise the website by injecting malicious code and impacting the unsuspecting users visiting these sites."
Whois records show that the domain was created on May 16. That's one day after the WP Live Chat Support developers released version 8.0.27, which fixed the vulnerability. Shrotriya published a list of 47 sites he said had been hit by the exploit. While some caused malicious redirects, others didn't and reported they were using patched versions of the plugin.