dedecms <=V5.7.102 is vulnerable to SQL Injection. In sys_ sql_ n query.php there are no restrictions on the sql query.
https://gist.github.com/yinfei6/f2b311374de4b4cec1dc22433d38c92a
Source: Mitre, NVD
Published: 2022-12-27
Updated: 2023-01-06
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H