The Easy Newsletter Signups WordPress plugin through 1.0.4 does not properly sanitise and escape a parameter before using it in a SQL statement, leading to a SQL injection exploitable by high privilege users such as admin
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
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https://wpscan.com/vulnerability/1b277929-e88b-4ab6-9190-526e75f5ce7a | third party advisory vdb entry exploit technical description |