Throwback Threat Thursday is a series of posts where we recall older vulnerabilities that have since been patched by their developers. In the past, these vulnerabilities caused significant impacts to the security of website owners. Some vulnerable sites may still be found in the wild.
Back in early 2017, our research team was looking into multiple open-source projects for security issues. While looking into the then-current WordPress 4.7.0, we found a severe content injection (privilege escalation) vulnerability.
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