dedecms <=V5.7.102 is vulnerable to SQL Injection. In sys_ sql_ n query.php there are no restrictions on the sql query.
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.
Link | Tags |
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https://gist.github.com/yinfei6/f2b311374de4b4cec1dc22433d38c92a | third party advisory |