Description
WordPress Plugin Smart Marketing SMS and Newsletters Forms is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to perform otherwise restricted actions and subsequently bring the website offline. WordPress Plugin Smart Marketing SMS and Newsletters Forms version 2.6.1 is vulnerable; prior versions may also be affected.
Remediation
Disable the plugin until a fix is available
References
Related Vulnerabilities
PHP Integer Overflow or Wraparound Vulnerability (CVE-2018-14883)
Joomla! Core 2.5.x Security Bypass (2.5.0 - 2.5.24)
WordPress 4.0.x Cross-Domain Flash Injection Vulnerability (4.0 - 4.0.21)
WordPress Plugin Fast Velocity Minify Information Disclosure (2.7.6)
Internet Information Services Other Vulnerability (CVE-2005-2089)