diff --git a/src/main/kotlin/dev/dnpm/etl/processor/config/AppSecurityConfiguration.kt b/src/main/kotlin/dev/dnpm/etl/processor/config/AppSecurityConfiguration.kt
index 900638c..ca511a7 100644
--- a/src/main/kotlin/dev/dnpm/etl/processor/config/AppSecurityConfiguration.kt
+++ b/src/main/kotlin/dev/dnpm/etl/processor/config/AppSecurityConfiguration.kt
@@ -21,6 +21,7 @@ package dev.dnpm.etl.processor.config
 
 import dev.dnpm.etl.processor.security.UserRole
 import dev.dnpm.etl.processor.security.UserRoleRepository
+import dev.dnpm.etl.processor.services.UserRoleService
 import org.slf4j.LoggerFactory
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
 import org.springframework.boot.context.properties.EnableConfigurationProperties
@@ -31,6 +32,8 @@ import org.springframework.security.config.annotation.web.configuration.EnableWe
 import org.springframework.security.config.annotation.web.invoke
 import org.springframework.security.core.authority.SimpleGrantedAuthority
 import org.springframework.security.core.authority.mapping.GrantedAuthoritiesMapper
+import org.springframework.security.core.session.SessionRegistry
+import org.springframework.security.core.session.SessionRegistryImpl
 import org.springframework.security.core.userdetails.User
 import org.springframework.security.core.userdetails.UserDetails
 import org.springframework.security.crypto.factory.PasswordEncoderFactories
@@ -82,7 +85,7 @@ class AppSecurityConfiguration(
 
     @Bean
     @ConditionalOnProperty(value = ["app.security.enable-oidc"], havingValue = "true")
-    fun filterChainOidc(http: HttpSecurity, passwordEncoder: PasswordEncoder, userRoleRepository: UserRoleRepository): SecurityFilterChain {
+    fun filterChainOidc(http: HttpSecurity, passwordEncoder: PasswordEncoder, userRoleRepository: UserRoleRepository, sessionRegistry: SessionRegistry): SecurityFilterChain {
         http {
             authorizeRequests {
                 authorize("/configs/**", hasRole("ADMIN"))
@@ -95,7 +98,7 @@ class AppSecurityConfiguration(
                 authorize("*.svg", permitAll)
                 authorize("*.css", permitAll)
                 authorize("/login/**", permitAll)
-                authorize(anyRequest, fullyAuthenticated)
+                authorize(anyRequest, permitAll)
             }
             httpBasic {
                 realmName = "ETL-Processor"
@@ -106,6 +109,16 @@ class AppSecurityConfiguration(
             oauth2Login {
                 loginPage = "/login"
             }
+            sessionManagement {
+                sessionConcurrency {
+                    maximumSessions = 1
+                    maxSessionsPreventsLogin = true
+                    expiredUrl = "/login?expired"
+                }
+                sessionFixation {
+                    newSession()
+                }
+            }
             csrf { disable() }
         }
         return http.build()
@@ -150,9 +163,19 @@ class AppSecurityConfiguration(
         return http.build()
     }
 
+    @Bean
+    fun sessionRegistry(): SessionRegistry {
+        return SessionRegistryImpl()
+    }
+
     @Bean
     fun passwordEncoder(): PasswordEncoder {
         return PasswordEncoderFactories.createDelegatingPasswordEncoder()
     }
 
+    @Bean
+    @ConditionalOnProperty(value = ["app.security.enable-oidc"], havingValue = "true")
+    fun userRoleService(userRoleRepository: UserRoleRepository, sessionRegistry: SessionRegistry): UserRoleService {
+        return UserRoleService(userRoleRepository, sessionRegistry)
+    }
 }
diff --git a/src/main/kotlin/dev/dnpm/etl/processor/security/UserRole.kt b/src/main/kotlin/dev/dnpm/etl/processor/security/UserRole.kt
index 83ba662..4de31f5 100644
--- a/src/main/kotlin/dev/dnpm/etl/processor/security/UserRole.kt
+++ b/src/main/kotlin/dev/dnpm/etl/processor/security/UserRole.kt
@@ -23,13 +23,13 @@ package dev.dnpm.etl.processor.security
 import org.springframework.data.annotation.Id
 import org.springframework.data.relational.core.mapping.Table
 import org.springframework.data.repository.CrudRepository
-import java.util.Optional
+import java.util.*
 
 @Table("user_role")
 data class UserRole(
     @Id val id: Long? = null,
     val username: String,
-    val role: Role = Role.GUEST
+    var role: Role = Role.GUEST
 )
 
 enum class Role(val value: String) {
diff --git a/src/main/kotlin/dev/dnpm/etl/processor/services/UserRoleService.kt b/src/main/kotlin/dev/dnpm/etl/processor/services/UserRoleService.kt
new file mode 100644
index 0000000..6649f7d
--- /dev/null
+++ b/src/main/kotlin/dev/dnpm/etl/processor/services/UserRoleService.kt
@@ -0,0 +1,61 @@
+/*
+ * This file is part of ETL-Processor
+ *
+ * Copyright (c) 2024  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package dev.dnpm.etl.processor.services
+
+import dev.dnpm.etl.processor.security.Role
+import dev.dnpm.etl.processor.security.UserRole
+import dev.dnpm.etl.processor.security.UserRoleRepository
+import org.springframework.data.repository.findByIdOrNull
+import org.springframework.security.core.session.SessionRegistry
+import org.springframework.security.oauth2.core.oidc.user.OidcUser
+
+class UserRoleService(
+    private val userRoleRepository: UserRoleRepository,
+    private val sessionRegistry: SessionRegistry
+) {
+    fun updateUserRole(id: Long, role: Role) {
+        val userRole = userRoleRepository.findByIdOrNull(id) ?: return
+        userRole.role = role
+        userRoleRepository.save(userRole)
+        expireSessionFor(userRole.username)
+    }
+
+    fun deleteUserRole(id: Long) {
+        val userRole = userRoleRepository.findByIdOrNull(id) ?: return
+        userRoleRepository.delete(userRole)
+        expireSessionFor(userRole.username)
+    }
+
+    fun findAll(): List<UserRole> {
+        return userRoleRepository.findAll().toList()
+    }
+
+    private fun expireSessionFor(username: String) {
+        sessionRegistry.allPrincipals
+            .filterIsInstance<OidcUser>()
+            .filter { it.preferredUsername == username }
+            .flatMap {
+                sessionRegistry.getAllSessions(it, true)
+            }
+            .onEach {
+                it.expireNow()
+            }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/dev/dnpm/etl/processor/web/ConfigController.kt b/src/main/kotlin/dev/dnpm/etl/processor/web/ConfigController.kt
index dbedee5..44ea400 100644
--- a/src/main/kotlin/dev/dnpm/etl/processor/web/ConfigController.kt
+++ b/src/main/kotlin/dev/dnpm/etl/processor/web/ConfigController.kt
@@ -22,9 +22,12 @@ package dev.dnpm.etl.processor.web
 import dev.dnpm.etl.processor.monitoring.ConnectionCheckService
 import dev.dnpm.etl.processor.output.MtbFileSender
 import dev.dnpm.etl.processor.pseudonym.Generator
+import dev.dnpm.etl.processor.security.Role
+import dev.dnpm.etl.processor.security.UserRole
 import dev.dnpm.etl.processor.services.Token
 import dev.dnpm.etl.processor.services.TokenService
 import dev.dnpm.etl.processor.services.TransformationService
+import dev.dnpm.etl.processor.services.UserRoleService
 import org.springframework.beans.factory.annotation.Qualifier
 import org.springframework.http.MediaType
 import org.springframework.http.codec.ServerSentEvent
@@ -43,7 +46,8 @@ class ConfigController(
     private val pseudonymGenerator: Generator,
     private val mtbFileSender: MtbFileSender,
     private val connectionCheckService: ConnectionCheckService,
-    private val tokenService: TokenService?
+    private val tokenService: TokenService?,
+    private val userRoleService: UserRoleService?
 ) {
 
     @GetMapping
@@ -56,10 +60,16 @@ class ConfigController(
         if (tokenService != null) {
             model.addAttribute("tokens", tokenService.findAll())
         } else {
-            model.addAttribute("tokens", listOf<Token>())
+            model.addAttribute("tokens", emptyList<Token>())
         }
         model.addAttribute("transformations", transformationService.getTransformations())
-
+        if (userRoleService != null) {
+            model.addAttribute("userRolesEnabled", true)
+            model.addAttribute("userRoles", userRoleService.findAll())
+        } else {
+            model.addAttribute("userRolesEnabled", false)
+            model.addAttribute("userRoles", emptyList<UserRole>())
+        }
         return "configs"
     }
 
@@ -112,6 +122,34 @@ class ConfigController(
         return "configs/tokens"
     }
 
+    @DeleteMapping(path = ["userroles/{id}"])
+    fun deleteUserRole(@PathVariable id: Long, model: Model): String {
+        if (userRoleService != null) {
+            userRoleService.deleteUserRole(id)
+
+            model.addAttribute("userRolesEnabled", true)
+            model.addAttribute("userRoles", userRoleService.findAll())
+        } else {
+            model.addAttribute("userRolesEnabled", false)
+            model.addAttribute("userRoles", emptyList<UserRole>())
+        }
+        return "configs/userroles"
+    }
+
+    @PutMapping(path = ["userroles/{id}"])
+    fun updateUserRole(@PathVariable id: Long, @ModelAttribute("role") role: Role, model: Model): String {
+        if (userRoleService != null) {
+            userRoleService.updateUserRole(id, role)
+
+            model.addAttribute("userRolesEnabled", true)
+            model.addAttribute("userRoles", userRoleService.findAll())
+        } else {
+            model.addAttribute("userRolesEnabled", false)
+            model.addAttribute("userRoles", emptyList<UserRole>())
+        }
+        return "configs/userroles"
+    }
+
     @GetMapping(path = ["events"], produces = [MediaType.TEXT_EVENT_STREAM_VALUE])
     fun events(): Flux<ServerSentEvent<Any>> {
         return configsUpdateProducer.asFlux().map {
diff --git a/src/main/resources/static/style.css b/src/main/resources/static/style.css
index c7a0b38..0dd5820 100644
--- a/src/main/resources/static/style.css
+++ b/src/main/resources/static/style.css
@@ -202,6 +202,17 @@ form.samplecode-input input:focus-visible {
     background: none;
 }
 
+.userrole-form form {
+    margin: 0;
+    padding: 0;
+
+    border: none;
+    border-radius: 0;
+    background: none;
+
+    text-align: inherit;
+}
+
 .login-form form *,
 .token-form form * {
     padding: 0.5em;
@@ -210,7 +221,8 @@ form.samplecode-input input:focus-visible {
 }
 
 .login-form form hr,
-.token-form form hr {
+.token-form form hr,
+.userrole-form form hr {
     padding: 0;
     width: 100%;
 }
@@ -224,6 +236,14 @@ form.samplecode-input input:focus-visible {
     border: none;
 }
 
+.userrole-form form select {
+    padding: 0.5em;
+    border: none;
+    border-radius: 3px;
+    line-height: 1.2rem;
+    font-size: 0.8rem;
+}
+
 .border {
     padding: 1.5em;
     border: 1px solid var(--table-border);
@@ -527,6 +547,10 @@ input.inline:focus-visible {
     color: var(--bg-green);
 }
 
+.notification.notice {
+    color: var(--bg-yellow);
+}
+
 .notification.error {
     color: var(--bg-red);
 }
diff --git a/src/main/resources/templates/configs.html b/src/main/resources/templates/configs.html
index ebef7ca..2103b0b 100644
--- a/src/main/resources/templates/configs.html
+++ b/src/main/resources/templates/configs.html
@@ -40,6 +40,9 @@
         <section th:insert="~{configs/tokens.html}">
         </section>
 
+        <section th:insert="~{configs/userroles.html}">
+        </section>
+
         <section hx-ext="sse" th:sse-connect="@{/configs/events}">
             <div th:insert="~{configs/connectionAvailable.html}" th:hx-get="@{/configs?connectionAvailable}" hx-trigger="sse:connection-available">
             </div>
diff --git a/src/main/resources/templates/configs/userroles.html b/src/main/resources/templates/configs/userroles.html
new file mode 100644
index 0000000..23cc5f2
--- /dev/null
+++ b/src/main/resources/templates/configs/userroles.html
@@ -0,0 +1,39 @@
+<div th:if="${not userRolesEnabled}">
+    <h2><span>⛔</span> Benutzerberechtigungen</h2>
+    <p>Die Verwendung von rollenbasierten Benutzerberechtigungen ist nicht aktiviert.</p>
+</div>
+
+<div id="userroles" th:if="${userRolesEnabled}">
+    <h2><span>✅</span> Benutzerberechtigungen</h2>
+    <div class="border">
+        <div th:if="${userRoles.isEmpty()}">Noch keine Benutzerberechtigungen vorhanden.</div>
+        <table th:if="${not userRoles.isEmpty()}">
+            <thead>
+                <tr>
+                    <th>Benutzername</th>
+                    <th>Rolle</th>
+                    <th></th>
+                </tr>
+            </thead>
+            <tbody>
+                <tr th:each="userRole : ${userRoles}">
+                    <td>[[ ${userRole.username} ]]</td>
+                    <td>
+                        <div class="userrole-form">
+                            <form th:hx-put="@{/configs/userroles/{id}(id=${userRole.id})}" hx-target="#userroles">
+                                <select name="role">
+                                    <option th:selected="${userRole.role.value == 'guest'}" value="GUEST">Gast</option>
+                                    <option th:selected="${userRole.role.value == 'user'}" value="USER">Benutzer</option>
+                                </select>
+                                <button class="btn btn-blue">Übernehmen</button>
+                            </form>
+                        </div>
+                    </td>
+                    <td>
+                        <button class="btn btn-red" th:hx-delete="@{/configs/userroles/{id}(id=${userRole.id})}" hx-target="#userroles">Löschen</button>
+                    </td>
+                </tr>
+            </tbody>
+        </table>
+    </div>
+</div>
\ No newline at end of file
diff --git a/src/main/resources/templates/login.html b/src/main/resources/templates/login.html
index 4ef8ec9..75a3681 100644
--- a/src/main/resources/templates/login.html
+++ b/src/main/resources/templates/login.html
@@ -11,6 +11,7 @@
         <div class="login-form">
             <h2 class="centered">Anmelden</h2>
             <div class="centered notification error" th:if="${param.error}">Anmeldung nicht erfolgreich</div>
+            <div class="centered notification notice" th:if="${param.expired}">Sitzung abgelaufen oder von einem Administrator beendet.</div>
             <div class="centered notification success" th:if="${param.logout}">Sie haben sich abgemeldet</div>
             <form method="post" th:action="@{/login}">
                 <input type="text" id="username" name="username" class="form-control" placeholder="Username" required="" autofocus="" />