diff --git a/CHANGELOG.md b/CHANGELOG.md
index a8a1df89e..04007ae0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -124,7 +124,10 @@
 - **Notifications**
   - rename translation key from 'appsubscription' to 'appSubscription' [#1054](https://github.com/eclipse-tractusx/portal-frontend/pull/1054)
 - **User Management**
+
   - fixed displaying of user management navigation button based on role validation [#1073](https://github.com/eclipse-tractusx/portal-frontend/pull/1073)
+  - Fixed special characters in user management email filters [#1128](https://github.com/eclipse-tractusx/portal-frontend/issues/1128)
+
 - **App Management**
   - fixed 400 Bad Request error due to search filter [#1057](https://github.com/eclipse-tractusx/portal-frontend/pull/1058)
   - added load more button app overview [#1009](https://github.com/eclipse-tractusx/portal-frontend/pull/1009)
diff --git a/src/components/shared/frame/UserList/index.tsx b/src/components/shared/frame/UserList/index.tsx
index 695e51e9e..c56248041 100644
--- a/src/components/shared/frame/UserList/index.tsx
+++ b/src/components/shared/frame/UserList/index.tsx
@@ -33,6 +33,7 @@ import type { TenantUser } from 'features/admin/userApiSlice'
 import './style.scss'
 import { setSearchInput } from 'features/appManagement/actions'
 import { appManagementSelector } from 'features/appManagement/slice'
+import { isSearchUserEmail } from 'types/Patterns'
 
 interface FetchHookArgsType {
   appId?: string
@@ -87,7 +88,7 @@ export const UserList = ({
   const searchInputData = useSelector(appManagementSelector)
 
   const validateSearchText = (expr: string) => {
-    const validateExpr = /^[ A-Za-z0-9._!@-]*$/.test(expr)
+    const validateExpr = isSearchUserEmail(expr)
     if (validateExpr) dispatch(setSearchInput({ open: true, text: expr }))
     return validateExpr
   }
diff --git a/src/features/admin/appuserApiSlice.ts b/src/features/admin/appuserApiSlice.ts
index 8d19d5731..fba3c076c 100644
--- a/src/features/admin/appuserApiSlice.ts
+++ b/src/features/admin/appuserApiSlice.ts
@@ -88,7 +88,7 @@ export const apiSlice = createApi({
     fetchAppUsersSearch: builder.query<PaginResult<TenantUser>, PaginFetchArgs>(
       {
         query: (fetchArgs) => {
-          const emailExpr = `&email=${fetchArgs.args!.expr}`
+          const emailExpr = `&email=${encodeURIComponent(fetchArgs.args!.expr)}`
           return {
             url: `/api/administration/user/owncompany/apps/${
               fetchArgs.args!.appId
diff --git a/src/features/admin/userApiSlice.ts b/src/features/admin/userApiSlice.ts
index 41982d8b4..ac8860bae 100644
--- a/src/features/admin/userApiSlice.ts
+++ b/src/features/admin/userApiSlice.ts
@@ -151,7 +151,7 @@ export const apiSlice = createApi({
       query: (fetchArgs) =>
         `/api/administration/user/owncompany/users?status=ACTIVE&size=${PAGE_SIZE}&page=${
           fetchArgs.page
-        }&email=${fetchArgs.args!.expr}`,
+        }&email=${encodeURIComponent(fetchArgs.args!.expr)}`,
     }),
     fetchUsersRoles: builder.query<PaginResult<TenantUser>, string>({
       query: (companyUserId) =>
diff --git a/src/types/Patterns.test.ts b/src/types/Patterns.test.ts
index 601842341..3040fdf3b 100644
--- a/src/types/Patterns.test.ts
+++ b/src/types/Patterns.test.ts
@@ -29,6 +29,7 @@ import {
   isCountryCode,
   isClientID,
   isPersonName,
+  isSearchUserEmail,
 } from './Patterns'
 
 const TESTDATA = {
@@ -214,6 +215,23 @@ const TESTDATA = {
     valid: ['sa-12', 'JSSS', 'Julia12'],
     invalid: ['&^%#@', '!', 'hash &*^#$'],
   },
+  EMAIL_SEARCH: {
+    valid: [
+      'john.doe@example.com',
+      'jane_doe123@example.com',
+      'user+tag@example.com',
+      'email@sub.domain.com',
+      'first.last@another-domain.org',
+      'name-with-dash@example-company.com',
+      'name.surname@domain.travel',
+      'name123@domain.ac',
+      'firstname+lastname@example.com',
+      'very.common@example.com',
+      'disposable.style.email.with+symbol@example.com',
+      'admin@admin-portal.co.uk',
+    ],
+    invalid: ['()*&^%$#/\\?><,`~'],
+  },
 }
 
 describe('Input Pattern Tests', () => {
@@ -304,4 +322,13 @@ describe('Input Pattern Tests', () => {
       expect(isClientID(expr)).toBe(false)
     })
   })
+
+  it('Validate email search for users', () => {
+    TESTDATA.EMAIL_SEARCH.valid.forEach((expr) => {
+      expect(isSearchUserEmail(expr)).toBe(true)
+    })
+    TESTDATA.EMAIL_SEARCH.invalid.forEach((expr) => {
+      expect(isSearchUserEmail(expr)).toBe(false)
+    })
+  })
 })
diff --git a/src/types/Patterns.ts b/src/types/Patterns.ts
index 5449c77bd..521bb9e05 100644
--- a/src/types/Patterns.ts
+++ b/src/types/Patterns.ts
@@ -58,7 +58,7 @@ export const Patterns = {
     URL: prefixUrlPattern,
     MAIL: /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@/,
   },
-  SEARCH: /^[a-zA-ZÀ-ÿ0-9 !?@&_\-.]{3,80}$/,
+  SEARCH: /^[a-zA-ZÀ-ÿ0-9 !?@&_+\-.]{3,80}$/,
   partner: {
     COMMERCIAL_REG_NUMBER: /^[a-zA-Z\d-\s]{9}$/,
     VAT_ID: /^[a-zA-Z\d-\s]{8,15}$/,
@@ -117,6 +117,7 @@ export const Patterns = {
     POSTAL_CODE:
       /^(?!.*\s$)(?=[a-zA-Z\d-]{0,10}[-\s]?[a-zA-Z\d-]{0,10}$)[a-zA-Z\d\s-]{2,10}$/,
   },
+  EMAIL_SEARCH: /^[ A-Za-z0-9._!@+-]*$/,
 }
 
 export const isEmpty = (expr: string) => !expr || expr.trim() === ''
@@ -205,5 +206,7 @@ export const isCompanyVies = (expr: string) =>
   Patterns.companyData.VIES.test(expr)
 export const isPostalCode = (expr: string) =>
   Patterns.companyData.POSTAL_CODE.test(expr)
+export const isSearchUserEmail = (expr: string) =>
+  Patterns.EMAIL_SEARCH.test(expr)
 
 export default Patterns