Vulnerability In WordPress Easy WP SMTP Plugin

djbaxter

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Hackers Abusing Recently Patched Vulnerability In Easy WP SMTP Plugin
by Mikey Veenstra , Wordfence
March 20, 2019

Over the weekend, a vulnerability was disclosed and patched in the popular WordPress plugin Easy WP SMTP. The plugin allows users to configure SMTP connections for outgoing email, and has a userbase of over 300,000 active installs. The vulnerability is only present in version 1.3.9 of the plugin, and all of the plugin’s users should update to 1.3.9.1 as quickly as possible to address the flaw.

This vulnerability is under active attack, being used by malicious actors to establish administrative control of affected sites en masse. ....

The attacks against this vulnerability are widespread, and successful exploits can grant full control of vulnerable sites to the attackers. As always, it’s important for users to regularly update their plugins in order to apply the security patches for vulnerabilities like these. Easy WP SMTP version 1.3.9.1 prevents unauthenticated access to the import script, as well as restricting affected options to only include expected values.

For typical WordPress users, if you believe your site may have been compromised as a result of this or any other vulnerability, consider reaching out to our team for a site cleaning. Otherwise, be on the lookout for the following indicators of compromise (IOCs):
  • Logged traffic from the following IPs:
    • 185.212.131.45
    • 185.212.128.22
    • 185.212.131.46
    • 86.109.170.200
  • Database siteurl and home values not matching their intended values, especially including the following domains:
    • setforconfigplease[.]com
    • getmyfreetraffic[.]com
  • Administrator accounts present for unknown users. For example:
    • devidpentesting99
    • larryking99
  • Malicious <script> tags injected into the first line of index.php files. For example:
    • <script type='text/javascript' async src='hXXps://setforspecialdomain[.]com/in2herg42t2?type=in2&frm=scr&'></script>

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