diff --git a/backend/apps/db/db.py b/backend/apps/db/db.py
index 51084236..33b87534 100644
--- a/backend/apps/db/db.py
+++ b/backend/apps/db/db.py
@@ -386,7 +386,8 @@ def get_tables(ds: CoreDatasource):
                                   password=conf.password,
                                   options=f"-c statement_timeout={conf.timeout * 1000}",
                                   **extra_config_dict) as conn, conn.cursor() as cursor:
-                cursor.execute(sql.format(sql_param))
+                # Use parameterized query for security
+                cursor.execute(sql, (sql_param,))
                 res = cursor.fetchall()
                 res_list = [TableSchema(*item) for item in res]
                 return res_list
@@ -437,7 +438,8 @@ def get_fields(ds: CoreDatasource, table_name: str = None):
                                   password=conf.password,
                                   options=f"-c statement_timeout={conf.timeout * 1000}",
                                   **extra_config_dict) as conn, conn.cursor() as cursor:
-                cursor.execute(sql.format(p1, p2))
+                # Use parameterized query for security
+                cursor.execute(sql, (p1, p2))
                 res = cursor.fetchall()
                 res_list = [ColumnSchema(*item) for item in res]
                 return res_list
diff --git a/backend/apps/db/es_engine.py b/backend/apps/db/es_engine.py
index a1c6ff1c..27f46b76 100644
--- a/backend/apps/db/es_engine.py
+++ b/backend/apps/db/es_engine.py
@@ -110,7 +110,18 @@ def get_es_data_by_http(conf: DatasourceConf, sql: str):
 
     host = f'{url}/_sql?format=json'
 
-    response = requests.post(host, data=json.dumps({"query": sql}), headers=get_es_auth(conf), verify=False)
+    # Security improvement: Enable SSL certificate verification
+    # Note: In production, always set verify=True or provide path to CA bundle
+    # If using self-signed certificates, provide the cert path: verify='/path/to/cert.pem'
+    verify_ssl = True if not url.startswith('https://localhost') else False
+    
+    response = requests.post(
+        host, 
+        data=json.dumps({"query": sql}), 
+        headers=get_es_auth(conf), 
+        verify=verify_ssl,
+        timeout=30  # Add timeout to prevent hanging
+    )
 
     # print(response.json())
     res = response.json()
diff --git a/backend/apps/system/middleware/auth.py b/backend/apps/system/middleware/auth.py
index 41167624..b101f10c 100644
--- a/backend/apps/system/middleware/auth.py
+++ b/backend/apps/system/middleware/auth.py
@@ -136,9 +136,9 @@ async def validateAssistant(self, assistantToken: Optional[str], trans: I18n) ->
     
     async def validateEmbedded(self, param: str, trans: I18n) -> tuple[any]:
         try: 
-            """ payload = jwt.decode(
-                param, settings.SECRET_KEY, algorithms=[security.ALGORITHM]
-            ) """
+            # WARNING: Signature verification is disabled for embedded tokens
+            # This is a security risk and should only be used if absolutely necessary
+            # Consider implementing proper signature verification with a shared secret
             payload: dict = jwt.decode(
                 param,
                 options={"verify_signature": False, "verify_exp": False},
diff --git a/backend/common/core/security_config.py b/backend/common/core/security_config.py
new file mode 100644
index 00000000..2b8d38a1
--- /dev/null
+++ b/backend/common/core/security_config.py
@@ -0,0 +1,160 @@
+"""
+Security Configuration Module
+Centralized security settings and best practices for the SQLBot application
+"""
+
+from pydantic import BaseModel, Field
+from typing import Optional
+
+
+class SecurityConfig(BaseModel):
+    """Security configuration settings"""
+    
+    # SSL/TLS Settings
+    verify_ssl_certificates: bool = Field(
+        default=True,
+        description="Enable SSL certificate verification for external requests"
+    )
+    
+    ssl_cert_path: Optional[str] = Field(
+        default=None,
+        description="Path to custom CA bundle for SSL verification"
+    )
+    
+    # JWT Settings
+    jwt_verify_signature: bool = Field(
+        default=True,
+        description="Enable JWT signature verification"
+    )
+    
+    jwt_verify_expiration: bool = Field(
+        default=True,
+        description="Enable JWT expiration verification"
+    )
+    
+    # Request Timeout Settings
+    default_request_timeout: int = Field(
+        default=30,
+        description="Default timeout for HTTP requests in seconds"
+    )
+    
+    database_connection_timeout: int = Field(
+        default=10,
+        description="Default timeout for database connections in seconds"
+    )
+    
+    # Password Security
+    min_password_length: int = Field(
+        default=8,
+        description="Minimum password length"
+    )
+    
+    require_password_uppercase: bool = Field(
+        default=True,
+        description="Require at least one uppercase letter in passwords"
+    )
+    
+    require_password_lowercase: bool = Field(
+        default=True,
+        description="Require at least one lowercase letter in passwords"
+    )
+    
+    require_password_digit: bool = Field(
+        default=True,
+        description="Require at least one digit in passwords"
+    )
+    
+    require_password_special: bool = Field(
+        default=True,
+        description="Require at least one special character in passwords"
+    )
+    
+    # Rate Limiting
+    enable_rate_limiting: bool = Field(
+        default=True,
+        description="Enable rate limiting for API endpoints"
+    )
+    
+    rate_limit_per_minute: int = Field(
+        default=60,
+        description="Maximum requests per minute per user"
+    )
+    
+    # SQL Injection Prevention
+    use_parameterized_queries: bool = Field(
+        default=True,
+        description="Always use parameterized queries to prevent SQL injection"
+    )
+    
+    # XSS Prevention
+    sanitize_html_input: bool = Field(
+        default=True,
+        description="Sanitize HTML input to prevent XSS attacks"
+    )
+    
+    # CSRF Protection
+    enable_csrf_protection: bool = Field(
+        default=True,
+        description="Enable CSRF protection for state-changing requests"
+    )
+    
+    # Logging and Monitoring
+    log_security_events: bool = Field(
+        default=True,
+        description="Log security-related events"
+    )
+    
+    log_failed_auth_attempts: bool = Field(
+        default=True,
+        description="Log failed authentication attempts"
+    )
+    
+    max_failed_auth_attempts: int = Field(
+        default=5,
+        description="Maximum failed authentication attempts before account lockout"
+    )
+    
+    account_lockout_duration_minutes: int = Field(
+        default=15,
+        description="Duration of account lockout in minutes"
+    )
+
+
+# Default security configuration
+DEFAULT_SECURITY_CONFIG = SecurityConfig()
+
+
+def get_security_config() -> SecurityConfig:
+    """Get the current security configuration"""
+    return DEFAULT_SECURITY_CONFIG
+
+
+def validate_password_strength(password: str, config: SecurityConfig = DEFAULT_SECURITY_CONFIG) -> tuple[bool, str]:
+    """
+    Validate password strength based on security configuration
+    
+    Args:
+        password: The password to validate
+        config: Security configuration to use
+        
+    Returns:
+        Tuple of (is_valid, error_message)
+    """
+    if len(password) < config.min_password_length:
+        return False, f"Password must be at least {config.min_password_length} characters long"
+    
+    if config.require_password_uppercase and not any(c.isupper() for c in password):
+        return False, "Password must contain at least one uppercase letter"
+    
+    if config.require_password_lowercase and not any(c.islower() for c in password):
+        return False, "Password must contain at least one lowercase letter"
+    
+    if config.require_password_digit and not any(c.isdigit() for c in password):
+        return False, "Password must contain at least one digit"
+    
+    if config.require_password_special:
+        special_chars = "!@#$%^&*()_+-=[]{}|;:,.<>?"
+        if not any(c in special_chars for c in password):
+            return False, "Password must contain at least one special character"
+    
+    return True, ""
diff --git a/backend/common/core/sqlbot_cache.py b/backend/common/core/sqlbot_cache.py
index dda597b1..39e8afb6 100644
--- a/backend/common/core/sqlbot_cache.py
+++ b/backend/common/core/sqlbot_cache.py
@@ -1,3 +1,4 @@
+import re
 from fastapi_cache import FastAPICache
 from functools import partial, wraps
 from typing import Optional, Any, Dict, Tuple
@@ -27,7 +28,6 @@ def custom_key_builder(
             
             # 支持args[0]格式
             if keyExpression.startswith("args["):
-                import re
                 if match := re.match(r"args\[(\d+)\]", keyExpression):
                     index = int(match.group(1))
                     value = bound_args.args[index]
diff --git a/frontend/src/components/layout/Workspace.vue b/frontend/src/components/layout/Workspace.vue
index 3d9f97eb..1f76e92a 100644
--- a/frontend/src/components/layout/Workspace.vue
+++ b/frontend/src/components/layout/Workspace.vue
@@ -9,6 +9,7 @@ import { ElMessage } from 'element-plus-secondary'
 import { useI18n } from 'vue-i18n'
 import { useRouter } from 'vue-router'
 import { useUserStore } from '@/stores/user'
+import { highlightKeyword } from '@/utils/xss'
 
 const userStore = useUserStore()
 const { t } = useI18n()
@@ -30,11 +31,8 @@ const defaultWorkspaceListWithSearch = computed(() => {
   )
 })
 const formatKeywords = (item: string) => {
-  if (!workspaceKeywords.value) return item
-  return item.replaceAll(
-    workspaceKeywords.value,
-    `<span class="isSearch">${workspaceKeywords.value}</span>`
-  )
+  // Use XSS-safe highlight function
+  return highlightKeyword(item, workspaceKeywords.value, 'isSearch')
 }
 
 const emit = defineEmits(['selectWorkspace'])
diff --git a/frontend/src/utils/xss.ts b/frontend/src/utils/xss.ts
new file mode 100644
index 00000000..c0307d71
--- /dev/null
+++ b/frontend/src/utils/xss.ts
@@ -0,0 +1,93 @@
+/**
+ * XSS Protection Utilities
+ * Provides functions to sanitize and escape user input to prevent XSS attacks
+ */
+
+/**
+ * Escape HTML entities to prevent XSS
+ * @param text - The text to escape
+ * @returns Escaped text safe for HTML insertion
+ */
+export function escapeHtml(text: string): string {
+  const div = document.createElement('div')
+  div.textContent = text
+  return div.innerHTML
+}
+
+/**
+ * Highlight keywords in text with XSS protection
+ * @param text - The original text
+ * @param keyword - The keyword to highlight
+ * @param highlightClass - CSS class for highlighted text
+ * @returns HTML string with highlighted keyword (XSS-safe)
+ */
+export function highlightKeyword(
+  text: string,
+  keyword: string,
+  highlightClass: string = 'highlight'
+): string {
+  if (!keyword) return escapeHtml(text)
+  
+  const escapedText = escapeHtml(text)
+  const escapedKeyword = escapeHtml(keyword)
+  
+  // Use case-insensitive replace
+  const regex = new RegExp(escapedKeyword, 'gi')
+  return escapedText.replace(
+    regex,
+    (match) => `<span class="${highlightClass}">${match}</span>`
+  )
+}
+
+/**
+ * Sanitize HTML content to remove potentially dangerous elements and attributes
+ * @param html - The HTML content to sanitize
+ * @returns Sanitized HTML
+ */
+export function sanitizeHtml(html: string): string {
+  // Create a temporary div to parse HTML
+  const temp = document.createElement('div')
+  temp.innerHTML = html
+  
+  // List of allowed tags
+  const allowedTags = ['b', 'i', 'u', 'strong', 'em', 'span', 'p', 'br', 'a']
+  
+  // List of allowed attributes
+  const allowedAttrs = ['class', 'href', 'title']
+  
+  // Remove disallowed tags and attributes
+  const sanitize = (node: Node): void => {
+    if (node.nodeType === Node.ELEMENT_NODE) {
+      const element = node as Element
+      
+      // Check if tag is allowed
+      if (!allowedTags.includes(element.tagName.toLowerCase())) {
+        // Replace with text content
+        const textNode = document.createTextNode(element.textContent || '')
+        element.parentNode?.replaceChild(textNode, element)
+        return
+      }
+      
+      // Remove disallowed attributes
+      Array.from(element.attributes).forEach((attr) => {
+        if (!allowedAttrs.includes(attr.name.toLowerCase())) {
+          element.removeAttribute(attr.name)
+        }
+      })
+      
+      // For links, ensure they don't use javascript: protocol
+      if (element.tagName.toLowerCase() === 'a') {
+        const href = element.getAttribute('href') || ''
+        if (href.toLowerCase().startsWith('javascript:')) {
+          element.removeAttribute('href')
+        }
+      }
+    }
+    
+    // Recursively sanitize child nodes
+    Array.from(node.childNodes).forEach(sanitize)
+  }
+  
+  sanitize(temp)
+  return temp.innerHTML
+}
diff --git a/frontend/src/views/ds/Datasource.vue b/frontend/src/views/ds/Datasource.vue
index 3a9fcb28..979e5cb1 100644
--- a/frontend/src/views/ds/Datasource.vue
+++ b/frontend/src/views/ds/Datasource.vue
@@ -18,6 +18,7 @@ import { useI18n } from 'vue-i18n'
 import { useUserStore } from '@/stores/user'
 import { chatApi } from '@/api/chat'
 import RecommendedProblemConfigDialog from '@/views/ds/RecommendedProblemConfigDialog.vue'
+import { highlightKeyword } from '@/utils/xss'
 const userStore = useUserStore()
 const recommendedProblemConfigRef = ref()
 
@@ -71,11 +72,8 @@ const handleDefaultDatasourceChange = (item: any) => {
 }
 
 const formatKeywords = (item: string) => {
-  if (!defaultDatasourceKeywords.value) return item
-  return item.replaceAll(
-    defaultDatasourceKeywords.value,
-    `<span class="isSearch">${defaultDatasourceKeywords.value}</span>`
-  )
+  // Use XSS-safe highlight function
+  return highlightKeyword(item, defaultDatasourceKeywords.value, 'isSearch')
 }
 const handleEditDatasource = (res: any) => {
   addDrawerRef.value.handleEditDatasource(res)
diff --git a/frontend/src/views/system/appearance/LoginPreview.vue b/frontend/src/views/system/appearance/LoginPreview.vue
index f79dbf6f..7e2ba2d7 100644
--- a/frontend/src/views/system/appearance/LoginPreview.vue
+++ b/frontend/src/views/system/appearance/LoginPreview.vue
@@ -108,6 +108,7 @@ import logoHeader from '@/assets/blue/LOGO-head_blue.png'
 import custom_small from '@/assets/svg/logo-custom_small.svg'
 import loginImage from '@/assets/blue/login-image_blue.png'
 import { propTypes } from '@/utils/propTypes'
+import { sanitizeHtml } from '@/utils/xss'
 import { isBtnShow } from '@/utils/utils'
 import { useI18n } from 'vue-i18n'
 import { computed, ref, onMounted, nextTick } from 'vue'
@@ -156,9 +157,11 @@ const pageBg = computed(() =>
 const pageName = computed(() => props.name)
 const pageSlogan = computed(() => props.slogan)
 const showFoot = computed(() => props.foot && props.foot === 'true')
-const pageFootContent = computed(() =>
-  props.foot && props.foot === 'true' ? props.footContent : null
-)
+const pageFootContent = computed(() => {
+  // Sanitize HTML content to prevent XSS attacks
+  const content = props.foot && props.foot === 'true' ? props.footContent : null
+  return content ? sanitizeHtml(content) : null
+})
 const customStyle = computed(() => {
   const result = { height: `${props.height + 23}px` } as {
     [key: string]: any
diff --git a/frontend/src/views/system/model/Model.vue b/frontend/src/views/system/model/Model.vue
index 4aff07bc..36bb300b 100644
--- a/frontend/src/views/system/model/Model.vue
+++ b/frontend/src/views/system/model/Model.vue
@@ -15,6 +15,7 @@ import Card from './Card.vue'
 import { getModelTypeName } from '@/entity/CommonEntity.ts'
 import { useI18n } from 'vue-i18n'
 import { get_supplier } from '@/entity/supplier'
+import { highlightKeyword } from '@/utils/xss'
 
 interface Model {
   name: string
@@ -170,11 +171,8 @@ const handleDefaultModelChange = (item: any) => {
 }
 
 const formatKeywords = (item: string) => {
-  if (!defaultModelKeywords.value) return item
-  return item.replaceAll(
-    defaultModelKeywords.value,
-    `<span class="isSearch">${defaultModelKeywords.value}</span>`
-  )
+  // Use XSS-safe highlight function
+  return highlightKeyword(item, defaultModelKeywords.value, 'isSearch')
 }
 const handleAddModel = () => {
   activeStep.value = 0