A SQL Injection vulnerability exists in the /feed/insert.json endpoint of the Emoncms project >= 11.6.9. The vulnerability is caused by improper handling of user-supplied input in the data query parameter, allowing attackers to execute arbitrary SQL commands under specific conditions.
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.