diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 602337ceb..9a1b2e64a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -337,11 +337,10 @@ package-app:
           [
             "debian-bookworm",
             "debian-bullseye",
+            "debian-buster",
             "ubuntu-jammy",
             "ubuntu-focal",
             "ubuntu-bionic",
-            "alpine-3.17.5",
-            "alpine-3.18.4",
             "fedora-38",
             "fedora-39",
           ]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 894b8eb6e..6fd40709e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,69 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 4.0.2 (2023-12-07)
+
+### Security issues
+
+This release fixes different security issues reported by the potsda.mn collective. Please make sure to upgrade as soon as possible.
+
+### Fixed
+
+- Fixes XSS issues in notifier and participant and event contacts list formatting
+
+
+* fix(front-end): add more security fixes for formatted lists and notifier ([1af8e37](https://framagit.org/framasoft/mobilizon/commits/1af8e37))
+
+
+## 4.0.1 (2023-12-07)
+
+### Security issues
+
+This release fixes different security issues reported by the potsda.mn collective. Please make sure to upgrade as soon as possible.
+
+### Added
+
+- Added a CLI task to test if emails configuration works properly
+
+### Fixed
+- Fixes XSS issues in groups descriptions, report contents, messages from anonymous participations and resources descriptions
+- Fixes Docker configuration that prevented the image to launch
+
+### Changed
+
+- Added back Debian Buster builds
+
+### Complete changelog
+
+* build(packages): add back Debian Buster as it seems people are still using it ([795ef24](https://framagit.org/framasoft/mobilizon/commits/795ef24))
+* build(packages): remove alpine packages as there's no demand for it ([0caaf2b](https://framagit.org/framasoft/mobilizon/commits/0caaf2b))
+* Translated using Weblate (Croatian) ([9c88fae](https://framagit.org/framasoft/mobilizon/commits/9c88fae))
+* Translated using Weblate (Croatian) ([623f4ee](https://framagit.org/framasoft/mobilizon/commits/623f4ee))
+* Translated using Weblate (Croatian) ([1162dd0](https://framagit.org/framasoft/mobilizon/commits/1162dd0))
+* Translated using Weblate (Galician) ([97c53bb](https://framagit.org/framasoft/mobilizon/commits/97c53bb))
+* Translated using Weblate (Galician) ([e08b057](https://framagit.org/framasoft/mobilizon/commits/e08b057))
+* Translated using Weblate (Galician) ([ec5e436](https://framagit.org/framasoft/mobilizon/commits/ec5e436))
+* Translated using Weblate (Korean) ([1a1ad52](https://framagit.org/framasoft/mobilizon/commits/1a1ad52))
+* Translated using Weblate (Korean) ([7b4c31d](https://framagit.org/framasoft/mobilizon/commits/7b4c31d))
+* fix: always consider report content as text ([ffff379](https://framagit.org/framasoft/mobilizon/commits/ffff379))
+* fix: sanitize descriptions from resources ([dc6647f](https://framagit.org/framasoft/mobilizon/commits/dc6647f))
+* fix(config): fix setting path for Mobilizon.Service.SiteMap ([7d725bd](https://framagit.org/framasoft/mobilizon/commits/7d725bd))
+* fix(docker): fix getting configuration value from env MOBILIZON_SMTP_TLS ([28063bd](https://framagit.org/framasoft/mobilizon/commits/28063bd)), closes [#1381](https://framagit.org/framasoft/mobilizon/issues/1381)
+* fix(docker): fix getting default value for MOBILIZON_SMTP_SSL env ([126727b](https://framagit.org/framasoft/mobilizon/commits/126727b))
+* fix(docker): use separate env for tzdata dir path ([9907f88](https://framagit.org/framasoft/mobilizon/commits/9907f88))
+* fix(emails): use tls_certificate_check to add tls config for mailer ([db38550](https://framagit.org/framasoft/mobilizon/commits/db38550))
+* fix(front): anonymous participant text is plain text, avoid using v-html ([2c12fbf](https://framagit.org/framasoft/mobilizon/commits/2c12fbf))
+* fix(front): fix editing group ([935799f](https://framagit.org/framasoft/mobilizon/commits/935799f))
+* fix(front): fix XSS because of bad operations when setting the group's summary ([ded59be](https://framagit.org/framasoft/mobilizon/commits/ded59be))
+* fix(front): put correct value for CONVERSATION_LIST enum value ([94bf2e5](https://framagit.org/framasoft/mobilizon/commits/94bf2e5))
+* fix(graphql): set default value for resource type parameter ([09f4132](https://framagit.org/framasoft/mobilizon/commits/09f4132))
+* feat(cli): add command to test emails send correctly ([7210f86](https://framagit.org/framasoft/mobilizon/commits/7210f86))
+* feat(docker): allow to configure loglevel at runtime through env variable ([4855af8](https://framagit.org/framasoft/mobilizon/commits/4855af8))
+* test: add new tests for XSS in actors summary ([58e50e3](https://framagit.org/framasoft/mobilizon/commits/58e50e3))
+* style: linting front-end ([41227d9](https://framagit.org/framasoft/mobilizon/commits/41227d9))
+* refactor(activitypub): handle failure finding public key in actor keys ([5b337f9](https://framagit.org/framasoft/mobilizon/commits/5b337f9))
+
+
 ## 4.0.0 (2023-12-05)
 
 ### Breaking changes
diff --git a/mix.exs b/mix.exs
index 53f2a77d6..27fde9dac 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule Mobilizon.Mixfile do
   use Mix.Project
 
-  @version "4.0.0"
+  @version "4.0.2"
 
   def project do
     [
diff --git a/package.json b/package.json
index 717557895..8c7ad704b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mobilizon",
-  "version": "4.0.0",
+  "version": "4.0.2",
   "private": true,
   "scripts": {
     "dev": "vite",
diff --git a/src/components/Account/ActorCard.vue b/src/components/Account/ActorCard.vue
index 2124b746d..6856a2bd0 100644
--- a/src/components/Account/ActorCard.vue
+++ b/src/components/Account/ActorCard.vue
@@ -30,7 +30,7 @@
         <span dir="ltr">@{{ usernameWithDomain(actor) }}</span>
       </p>
       <div
-        v-if="full"
+        v-if="full && actor.type === ActorType.GROUP"
         class="only-first-child"
         :class="{
           'line-clamp-3': limit,
@@ -38,6 +38,15 @@
         }"
         v-html="actor.summary"
       />
+      <div
+        v-if="full && actor.type === ActorType.PERSON"
+        class="only-first-child"
+        :class="{
+          'line-clamp-3': limit,
+          'line-clamp-10': !limit,
+        }"
+        v-text="actor.summary"
+      />
     </div>
     <div class="flex pr-2" v-if="actor.type === ActorType.PERSON">
       <router-link
diff --git a/src/components/Conversations/ConversationListItem.vue b/src/components/Conversations/ConversationListItem.vue
index 8ac1913b1..b07a3a69b 100644
--- a/src/components/Conversations/ConversationListItem.vue
+++ b/src/components/Conversations/ConversationListItem.vue
@@ -96,6 +96,7 @@ import { useI18n } from "vue-i18n";
 import { formatList } from "@/utils/i18n";
 import { displayName } from "@/types/actor";
 import { useCurrentActorClient } from "@/composition/apollo/actor";
+import { escapeHtml } from "@/utils/html";
 
 const props = defineProps<{
   conversation: IConversation;
@@ -137,7 +138,7 @@ const actualDate = computed((): string => {
 const formattedListOfParticipants = computed(() => {
   return formatList(
     otherParticipants.value.map(
-      (participant) => `<b>${displayName(participant)}</b>`
+      (participant) => `<b>${escapeHtml(displayName(participant))}</b>`
     )
   );
 });
diff --git a/src/plugins/notifier.ts b/src/plugins/notifier.ts
index 0b5e9c3fe..23719b706 100644
--- a/src/plugins/notifier.ts
+++ b/src/plugins/notifier.ts
@@ -1,3 +1,4 @@
+import { escapeHtml } from "@/utils/html";
 import { App } from "vue";
 
 export class Notifier {
@@ -21,7 +22,7 @@ export class Notifier {
 
   private notification(message: string, type: string) {
     this.app.config.globalProperties.$oruga.notification.open({
-      message,
+      message: escapeHtml(message),
       duration: 5000,
       position: "bottom-right",
       type,
diff --git a/src/utils/html.ts b/src/utils/html.ts
index 02b8763b4..7f0ac34a9 100644
--- a/src/utils/html.ts
+++ b/src/utils/html.ts
@@ -5,3 +5,13 @@ export const getValueFromMeta = (name: string): string | null => {
   }
   return null;
 };
+
+export function escapeHtml(html: string) {
+  const p = document.createElement("p");
+  p.appendChild(document.createTextNode(html.trim()));
+
+  const escapedContent = p.innerHTML;
+  p.remove();
+
+  return escapedContent;
+}
diff --git a/src/views/Event/EditView.vue b/src/views/Event/EditView.vue
index d833d8dea..3d9deba6c 100644
--- a/src/views/Event/EditView.vue
+++ b/src/views/Event/EditView.vue
@@ -180,7 +180,7 @@
                   {
                     contact: formatList(
                       event.contacts.map((contact) =>
-                        displayNameAndUsername(contact)
+                        escapeHtml(displayNameAndUsername(contact))
                       )
                     ),
                   },
@@ -628,6 +628,7 @@ import { useHead } from "@unhead/vue";
 import { useProgrammatic } from "@oruga-ui/oruga-next";
 import type { Locale } from "date-fns";
 import sortBy from "lodash/sortBy";
+import { escapeHtml } from "@/utils/html";
 
 const DEFAULT_LIMIT_NUMBER_OF_PLACES = 10;