diff --git a/changelog.d/3831.skip b/changelog.d/3831.skip
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/changelog.d/3896.add b/changelog.d/3896.add
new file mode 100644
index 0000000000..36d8286ff0
--- /dev/null
+++ b/changelog.d/3896.add
@@ -0,0 +1 @@
+Validate Host header for MediaProxy and Uploads and return a 302 if the base_url has changed
diff --git a/changelog.d/3897.add b/changelog.d/3897.add
new file mode 100644
index 0000000000..5c4402f451
--- /dev/null
+++ b/changelog.d/3897.add
@@ -0,0 +1 @@
+OnlyMedia Upload Filter
diff --git a/changelog.d/3899.skip b/changelog.d/3899.skip
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/docs/configuration/cheatsheet.md b/docs/configuration/cheatsheet.md
index 5c7ff11373..2dbe7f9f64 100644
--- a/docs/configuration/cheatsheet.md
+++ b/docs/configuration/cheatsheet.md
@@ -672,6 +672,12 @@ This filter reads the ImageDescription and iptc:Caption-Abstract fields with Exi
 
 No specific configuration.
 
+#### Pleroma.Upload.Filter.OnlyMedia
+
+This filter rejects uploads that are not identified with Content-Type matching audio/\*, image/\*, or video/\*
+
+No specific configuration.
+
 #### Pleroma.Upload.Filter.Mogrify
 
 * `args`: List of actions for the `mogrify` command like `"strip"` or `["strip", "auto-orient", {"implode", "1"}]`.
diff --git a/lib/pleroma/upload/filter.ex b/lib/pleroma/upload/filter.ex
index 717f066211..809bc6e702 100644
--- a/lib/pleroma/upload/filter.ex
+++ b/lib/pleroma/upload/filter.ex
@@ -38,9 +38,9 @@ def filter([filter | rest], upload) do
       {:ok, :noop} ->
         filter(rest, upload)
 
-      error ->
-        Logger.error("#{__MODULE__}: Filter #{filter} failed: #{inspect(error)}")
-        error
+      {:error, e} ->
+        Logger.error("#{__MODULE__}: Filter #{filter} failed: #{inspect(e)}")
+        {:error, e}
     end
   end
 end
diff --git a/lib/pleroma/upload/filter/only_media.ex b/lib/pleroma/upload/filter/only_media.ex
new file mode 100644
index 0000000000..a9caeba67e
--- /dev/null
+++ b/lib/pleroma/upload/filter/only_media.ex
@@ -0,0 +1,20 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Upload.Filter.OnlyMedia do
+  @behaviour Pleroma.Upload.Filter
+  alias Pleroma.Upload
+
+  def filter(%Upload{content_type: content_type}) do
+    [type, _subtype] = String.split(content_type, "/")
+
+    if type in ["image", "video", "audio"] do
+      {:ok, :noop}
+    else
+      {:error, "Disallowed content-type: #{content_type}"}
+    end
+  end
+
+  def filter(_), do: {:ok, :noop}
+end
diff --git a/lib/pleroma/web/media_proxy/media_proxy_controller.ex b/lib/pleroma/web/media_proxy/media_proxy_controller.ex
index bda5b36edc..20f3a34389 100644
--- a/lib/pleroma/web/media_proxy/media_proxy_controller.ex
+++ b/lib/pleroma/web/media_proxy/media_proxy_controller.ex
@@ -12,6 +12,7 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
   alias Pleroma.Web.MediaProxy
   alias Plug.Conn
 
+  plug(:validate_host)
   plug(:sandbox)
 
   def remote(conn, %{"sig" => sig64, "url" => url64}) do
@@ -205,6 +206,30 @@ defp media_proxy_opts do
     Config.get([:media_proxy, :proxy_opts], [])
   end
 
+  defp validate_host(conn, _params) do
+    %{scheme: proxy_scheme, host: proxy_host, port: proxy_port} =
+      MediaProxy.base_url() |> URI.parse()
+
+    if match?(^proxy_host, conn.host) do
+      conn
+    else
+      redirect_url =
+        %URI{
+          scheme: proxy_scheme,
+          host: proxy_host,
+          port: proxy_port,
+          path: conn.request_path,
+          query: conn.query_string
+        }
+        |> URI.to_string()
+        |> String.trim_trailing("?")
+
+      conn
+      |> Phoenix.Controller.redirect(external: redirect_url)
+      |> halt()
+    end
+  end
+
   defp sandbox(conn, _params) do
     conn
     |> merge_resp_headers([{"content-security-policy", "sandbox;"}])
diff --git a/lib/pleroma/web/plugs/uploaded_media.ex b/lib/pleroma/web/plugs/uploaded_media.ex
index 8b3bc9acbd..9dd5eb2398 100644
--- a/lib/pleroma/web/plugs/uploaded_media.ex
+++ b/lib/pleroma/web/plugs/uploaded_media.ex
@@ -46,12 +46,32 @@ def call(%{request_path: <<"/", @path, "/", file::binary>>} = conn, opts) do
 
     config = Pleroma.Config.get(Pleroma.Upload)
 
-    with uploader <- Keyword.fetch!(config, :uploader),
+    %{scheme: media_scheme, host: media_host, port: media_port} =
+      Pleroma.Upload.base_url() |> URI.parse()
+
+    with {:valid_host, true} <- {:valid_host, match?(^media_host, conn.host)},
+         uploader <- Keyword.fetch!(config, :uploader),
          proxy_remote = Keyword.get(config, :proxy_remote, false),
          {:ok, get_method} <- uploader.get_file(file),
          false <- media_is_banned(conn, get_method) do
       get_media(conn, get_method, proxy_remote, opts)
     else
+      {:valid_host, false} ->
+        redirect_url =
+          %URI{
+            scheme: media_scheme,
+            host: media_host,
+            port: media_port,
+            path: conn.request_path,
+            query: conn.query_string
+          }
+          |> URI.to_string()
+          |> String.trim_trailing("?")
+
+        conn
+        |> Phoenix.Controller.redirect(external: redirect_url)
+        |> halt()
+
       _ ->
         conn
         |> send_resp(:internal_server_error, dgettext("errors", "Failed"))
diff --git a/mix.exs b/mix.exs
index d7f8faa107..dd3dcdc65e 100644
--- a/mix.exs
+++ b/mix.exs
@@ -11,7 +11,7 @@ def project do
       version: version("2.5.52"),
       elixir: "~> 1.11",
       elixirc_paths: elixirc_paths(Mix.env()),
-      compilers: [:phoenix, :gettext] ++ Mix.compilers(),
+      compilers: [:phoenix] ++ Mix.compilers(),
       elixirc_options: [warnings_as_errors: warnings_as_errors()],
       xref: [exclude: [:eldap]],
       start_permanent: Mix.env() == :prod,
@@ -132,10 +132,7 @@ defp deps do
       {:telemetry_poller, "~> 1.0"},
       # oban 2.14 requires Elixir 1.12+
       {:oban, "~> 2.13.4"},
-      {:gettext,
-       git: "https://github.com/tusooa/gettext.git",
-       ref: "72fb2496b6c5280ed911bdc3756890e7f38a4808",
-       override: true},
+      {:gettext, "~> 0.20"},
       {:bcrypt_elixir, "~> 2.2"},
       {:trailing_format_plug, "~> 0.0.7"},
       {:fast_sanitize, "~> 0.2.0"},
diff --git a/mix.lock b/mix.lock
index 797207e4e4..d4a0d0c2f7 100644
--- a/mix.lock
+++ b/mix.lock
@@ -44,6 +44,7 @@
   "ex_doc": {:hex, :ex_doc, "0.29.4", "6257ecbb20c7396b1fe5accd55b7b0d23f44b6aa18017b415cb4c2b91d997729", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "2c6699a737ae46cb61e4ed012af931b57b699643b24dabe2400a8168414bc4f5"},
   "ex_machina": {:hex, :ex_machina, "2.7.0", "b792cc3127fd0680fecdb6299235b4727a4944a09ff0fa904cc639272cd92dc7", [:mix], [{:ecto, "~> 2.2 or ~> 3.0", [hex: :ecto, repo: "hexpm", optional: true]}, {:ecto_sql, "~> 3.0", [hex: :ecto_sql, repo: "hexpm", optional: true]}], "hexpm", "419aa7a39bde11894c87a615c4ecaa52d8f107bbdd81d810465186f783245bf8"},
   "ex_syslogger": {:hex, :ex_syslogger, "1.5.2", "72b6aa2d47a236e999171f2e1ec18698740f40af0bd02c8c650bf5f1fd1bac79", [:mix], [{:poison, ">= 1.5.0", [hex: :poison, repo: "hexpm", optional: true]}, {:syslog, "~> 1.1.0", [hex: :syslog, repo: "hexpm", optional: false]}], "hexpm", "ab9fab4136dbc62651ec6f16fa4842f10cf02ab4433fa3d0976c01be99398399"},
+  "expo": {:hex, :expo, "0.4.1", "1c61d18a5df197dfda38861673d392e642649a9cef7694d2f97a587b2cfb319b", [:mix], [], "hexpm", "2ff7ba7a798c8c543c12550fa0e2cbc81b95d4974c65855d8d15ba7b37a1ce47"},
   "fast_html": {:hex, :fast_html, "2.0.5", "c61760340606c1077ff1f196f17834056cb1dd3d5cb92a9f2cabf28bc6221c3c", [:make, :mix], [{:elixir_make, "~> 0.4", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 0.2.0", [hex: :nimble_pool, repo: "hexpm", optional: false]}], "hexpm", "605f4f4829443c14127694ebabb681778712ceecb4470ec32aa31012330e6506"},
   "fast_sanitize": {:hex, :fast_sanitize, "0.2.3", "67b93dfb34e302bef49fec3aaab74951e0f0602fd9fa99085987af05bd91c7a5", [:mix], [{:fast_html, "~> 2.0", [hex: :fast_html, repo: "hexpm", optional: false]}, {:plug, "~> 1.8", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "e8ad286d10d0386e15d67d0ee125245ebcfbc7d7290b08712ba9013c8c5e56e2"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
@@ -55,7 +56,7 @@
   "gen_state_machine": {:hex, :gen_state_machine, "2.0.5", "9ac15ec6e66acac994cc442dcc2c6f9796cf380ec4b08267223014be1c728a95", [:mix], [], "hexpm"},
   "geo": {:hex, :geo, "3.4.3", "0ddf3f681993d32c397e5ef346e7b4b6f36f39ed138502429832fa4000ebb9d5", [:mix], [{:jason, "~> 1.2", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "e23f2892e5437ec8b063cee1beccec89c58fd841ae11133304700235feb25552"},
   "geospatial": {:hex, :geospatial, "0.2.0", "c6c9f57df647cabbda71825bbba8465645002922a0c2e6410dc50279dbc95265", [:mix], [{:geo, "~> 3.4", [hex: :geo, repo: "hexpm", optional: false]}, {:hackney, "~> 1.6", [hex: :hackney, repo: "hexpm", optional: false]}, {:tesla, "~> 1.4.0", [hex: :tesla, repo: "hexpm", optional: false]}, {:tz_world, "~> 1.0", [hex: :tz_world, repo: "hexpm", optional: false]}], "hexpm", "b2f0e8f05a3d40f5473bf546d6b971bb82357e28c4f62c93c160d9e3c3581cb0"},
-  "gettext": {:git, "https://github.com/tusooa/gettext.git", "72fb2496b6c5280ed911bdc3756890e7f38a4808", [ref: "72fb2496b6c5280ed911bdc3756890e7f38a4808"]},
+  "gettext": {:hex, :gettext, "0.22.2", "6bfca374de34ecc913a28ba391ca184d88d77810a3e427afa8454a71a51341ac", [:mix], [{:expo, "~> 0.4.0", [hex: :expo, repo: "hexpm", optional: false]}], "hexpm", "8a2d389673aea82d7eae387e6a2ccc12660610080ae7beb19452cfdc1ec30f60"},
   "glob": {:hex, :glob, "1.0.0", "b4d54d66e7797ce037cdd18f2587fc9932187355340e222cafe125cd333d7a0a", [:rebar3], [], "hexpm", "ca25de25ac5a762ba6c979718ae6afef8402cfc9155b87479d215fbe676801e1"},
   "gun": {:hex, :gun, "2.0.0", "2326bc0fd6d9cf628419708270d6fe8b02b8d002cf992e4165a77d997b1defd0", [:make, :rebar3], [{:cowlib, "2.12.0", [hex: :cowlib, repo: "hexpm", optional: false]}], "hexpm", "6613cb7c62930dc8d58263c44dda72f8556346ba88358fc929dcbc5f76d04569"},
   "hackney": {:hex, :hackney, "1.18.1", "f48bf88f521f2a229fc7bae88cf4f85adc9cd9bcf23b5dc8eb6a1788c662c4f6", [:rebar3], [{:certifi, "~>2.9.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~>6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~>1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.3.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~>1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~>0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "a4ecdaff44297e9b5894ae499e9a070ea1888c84afdd1fd9b7b2bc384950128e"},
diff --git a/priv/gettext/en_test/LC_MESSAGES/default.po b/priv/gettext/en_test/LC_MESSAGES/default.po
index 63db74608a..037e144662 100644
--- a/priv/gettext/en_test/LC_MESSAGES/default.po
+++ b/priv/gettext/en_test/LC_MESSAGES/default.po
@@ -9,7 +9,6 @@
 msgid ""
 msgstr ""
 "Language: en_test\n"
-"Plural-Forms: nplurals=2\n"
 
 #, elixir-format
 #: lib/pleroma/web/api_spec/render_error.ex:122
diff --git a/priv/gettext/en_test/LC_MESSAGES/errors.po b/priv/gettext/en_test/LC_MESSAGES/errors.po
index a40de7f8ba..286bbb1aa8 100644
--- a/priv/gettext/en_test/LC_MESSAGES/errors.po
+++ b/priv/gettext/en_test/LC_MESSAGES/errors.po
@@ -9,7 +9,6 @@
 msgid ""
 msgstr ""
 "Language: en_test\n"
-"Plural-Forms: nplurals=2\n"
 
 msgid "can't be blank"
 msgstr ""
diff --git a/priv/gettext/en_test/LC_MESSAGES/posix_errors.po b/priv/gettext/en_test/LC_MESSAGES/posix_errors.po
index 663fc59242..6ff9dc53de 100644
--- a/priv/gettext/en_test/LC_MESSAGES/posix_errors.po
+++ b/priv/gettext/en_test/LC_MESSAGES/posix_errors.po
@@ -9,7 +9,6 @@
 msgid ""
 msgstr ""
 "Language: en_test\n"
-"Plural-Forms: nplurals=2\n"
 
 msgid "eperm"
 msgstr ""
diff --git a/priv/gettext/en_test/LC_MESSAGES/static_pages.po b/priv/gettext/en_test/LC_MESSAGES/static_pages.po
index 1a3b7b355b..daf3120938 100644
--- a/priv/gettext/en_test/LC_MESSAGES/static_pages.po
+++ b/priv/gettext/en_test/LC_MESSAGES/static_pages.po
@@ -21,10 +21,6 @@ msgstr ""
 #~ ##
 #~ ## Use "mix gettext.extract --merge" or "mix gettext.merge"
 #~ ## to merge POT files into PO files.
-#~ msgid ""
-#~ msgstr ""
-#~ "Language: en_test\n"
-#~ "Plural-Forms: nplurals=2\n"
 
 #, elixir-format
 #: lib/pleroma/web/templates/twitter_api/remote_follow/follow.html.eex:9
diff --git a/priv/gettext/ru/LC_MESSAGES/errors.po b/priv/gettext/ru/LC_MESSAGES/errors.po
index 39f83e8a67..64218da6fb 100644
--- a/priv/gettext/ru/LC_MESSAGES/errors.po
+++ b/priv/gettext/ru/LC_MESSAGES/errors.po
@@ -9,7 +9,6 @@
 msgid ""
 msgstr ""
 "Language: ru\n"
-"Plural-Forms: nplurals=3\n"
 
 msgid "can't be blank"
 msgstr "не может быть пустым"
diff --git a/priv/gettext/zh_Hans/LC_MESSAGES/static_pages.po b/priv/gettext/zh_Hans/LC_MESSAGES/static_pages.po
index cbd6feb60d..809b13d476 100644
--- a/priv/gettext/zh_Hans/LC_MESSAGES/static_pages.po
+++ b/priv/gettext/zh_Hans/LC_MESSAGES/static_pages.po
@@ -24,10 +24,6 @@ msgstr ""
 ##
 ## Use "mix gettext.extract --merge" or "mix gettext.merge"
 ## to merge POT files into PO files.
-#~ msgid ""
-#~ msgstr ""
-#~ "Language: zh_Hans\n"
-#~ "Plural-Forms: nplurals=1\n"
 
 #: lib/pleroma/web/templates/twitter_api/remote_follow/follow.html.eex:9
 #, elixir-format
diff --git a/test/pleroma/upload/filter/only_media_test.exs b/test/pleroma/upload/filter/only_media_test.exs
new file mode 100644
index 0000000000..75be070a19
--- /dev/null
+++ b/test/pleroma/upload/filter/only_media_test.exs
@@ -0,0 +1,32 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Upload.Filter.OnlyMediaTest do
+  use Pleroma.DataCase, async: true
+
+  alias Pleroma.Upload
+  alias Pleroma.Upload.Filter.OnlyMedia
+
+  test "Allows media Content-Type" do
+    ["audio/mpeg", "image/jpeg", "video/mp4"]
+    |> Enum.each(fn type ->
+      upload = %Upload{
+        content_type: type
+      }
+
+      assert {:ok, :noop} = OnlyMedia.filter(upload)
+    end)
+  end
+
+  test "Disallows non-media Content-Type" do
+    ["application/javascript", "application/pdf", "text/html"]
+    |> Enum.each(fn type ->
+      upload = %Upload{
+        content_type: type
+      }
+
+      assert {:error, _} = OnlyMedia.filter(upload)
+    end)
+  end
+end
diff --git a/test/pleroma/web/media_proxy/media_proxy_controller_test.exs b/test/pleroma/web/media_proxy/media_proxy_controller_test.exs
index 9ce092fd8f..deb407709a 100644
--- a/test/pleroma/web/media_proxy/media_proxy_controller_test.exs
+++ b/test/pleroma/web/media_proxy/media_proxy_controller_test.exs
@@ -54,6 +54,35 @@ test "it returns 403 for invalid signature", %{conn: conn, url: url} do
              } = get(conn, "/proxy/hhgfh/eeee/fff")
     end
 
+    test "it returns a 302 for invalid host", %{conn: conn} do
+      new_proxy_base = "http://mp.localhost/"
+
+      %{scheme: new_proxy_scheme, host: new_proxy_host, port: new_proxy_port} =
+        URI.parse(new_proxy_base)
+
+      clear_config([:media_proxy, :base_url], new_proxy_base)
+
+      proxy_url =
+        MediaProxy.encode_url("https://pleroma.social/logo.jpeg")
+        |> URI.parse()
+        |> Map.put(:host, "wronghost")
+        |> URI.to_string()
+
+      expected_url =
+        URI.parse(proxy_url)
+        |> Map.put(:host, new_proxy_host)
+        |> Map.put(:port, new_proxy_port)
+        |> Map.put(:scheme, new_proxy_scheme)
+        |> URI.to_string()
+
+      with_mock Pleroma.ReverseProxy,
+        call: fn _conn, _url, _opts -> %Conn{status: :success} end do
+        conn = get(conn, proxy_url)
+
+        assert redirected_to(conn, 302) == expected_url
+      end
+    end
+
     test "redirects to valid url when filename is invalidated", %{conn: conn, url: url} do
       invalid_url = String.replace(url, "test.png", "test-file.png")
       response = get(conn, invalid_url)
diff --git a/test/pleroma/web/plugs/uploaded_media_plug_test.exs b/test/pleroma/web/plugs/uploaded_media_plug_test.exs
index 8323ff6aba..dbf8ca5ec4 100644
--- a/test/pleroma/web/plugs/uploaded_media_plug_test.exs
+++ b/test/pleroma/web/plugs/uploaded_media_plug_test.exs
@@ -40,4 +40,30 @@ test "sends Content-Disposition header when name param is set", %{
              &(&1 == {"content-disposition", ~s[inline; filename="\\"cofe\\".gif"]})
            )
   end
+
+  test "denies access to media if wrong Host", %{
+    attachment_url: attachment_url
+  } do
+    conn = get(build_conn(), attachment_url)
+
+    assert conn.status == 200
+
+    new_media_base = "http://media.localhost:8080"
+
+    %{scheme: new_media_scheme, host: new_media_host, port: new_media_port} =
+      URI.parse(new_media_base)
+
+    clear_config([Pleroma.Upload, :base_url], new_media_base)
+
+    conn = get(build_conn(), attachment_url)
+
+    expected_url =
+      URI.parse(attachment_url)
+      |> Map.put(:host, new_media_host)
+      |> Map.put(:port, new_media_port)
+      |> Map.put(:scheme, new_media_scheme)
+      |> URI.to_string()
+
+    assert redirected_to(conn, 302) == expected_url
+  end
 end
diff --git a/test/support/conn_case.ex b/test/support/conn_case.ex
index f010fec332..c1cb0295ba 100644
--- a/test/support/conn_case.ex
+++ b/test/support/conn_case.ex
@@ -120,6 +120,9 @@ defp json_response_and_validate_schema(conn, _status) do
 
     Mox.verify_on_exit!()
 
-    {:ok, conn: Phoenix.ConnTest.build_conn()}
+    {:ok,
+     conn:
+       Phoenix.ConnTest.build_conn()
+       |> Map.put(:host, Pleroma.Web.Endpoint.host())}
   end
 end