Slims9 Bulian 9.4.2 is affected by Cross Site Scripting (XSS) in /admin/modules/system/custom_field.php.
**Describe the bug**
Storage type xss exists in Custom Field Editor in /admin/modules/system/custom_field.php file. There is no effective defense against the NOTE field, leading to cross-site script attacks.

**To Reproduce**
Steps to reproduce the behavior:
Storage type xss exists in Custom Field Editor in /admin/modules/system/custom_field.php file. There is no effective defense against the NOTE field, leading to cross-site scripting attacks.
Administrator login "system" add new "field> fill in cross-site scripting in the NOTE field `(example:'"><svg/onload=alert(document.domain)>)`
It will take effect after saving.

**Expected behavior**
You can insert js scripts to attack.

**Screenshots**
<img width="1071" alt="3" src="https://user-images.githubusercontent.com/18564938/147060823-4a8328b5-9ea5-400a-80d2-48c4a8828895.png">
<img width="1087" alt="4" src="https://user-images.githubusercontent.com/18564938/147060883-f5af4b94-3587-4dee-9e94-45415050b3eb.png">


**Desktop :**
 - OS: [MacBook M1]
 - Browser [Chrome]
 - Version [96.0.4664.110]


[Security Bug]Stored cross-site script attacks（xss）
This is a GitHub Issue
repo:slims9_bulian
owner:slims
Title : [Security Bug]Stored cross-site script attacks（xss）
Issue date:

--- start body ---
**Describe the bug**
Storage type xss exists in Custom Field Editor in /admin/modules/system/custom_field.php file. There is no effective defense against the NOTE field, leading to cross-site script attacks.

**To Reproduce**
Steps to reproduce the behavior:
Storage type xss exists in Custom Field Editor in /admin/modules/system/custom_field.php file. There is no effective defense against the NOTE field, leading to cross-site scripting attacks.
Administrator login "system" add new "field> fill in cross-site scripting in the NOTE field `(example:'"><svg/onload=alert(document.domain)>)`
It will take effect after saving.

**Expected behavior**
You can insert js scripts to attack.

**Screenshots**
<img width="1071" alt="3" src="https://user-images.githubusercontent.com/18564938/147060823-4a8328b5-9ea5-400a-80d2-48c4a8828895.png">
<img width="1087" alt="4" src="https://user-images.githubusercontent.com/18564938/147060883-f5af4b94-3587-4dee-9e94-45415050b3eb.png">


**Desktop :**
 - OS: [MacBook M1]
 - Browser [Chrome]
 - Version [96.0.4664.110]


--- end body ---
