diff --git a/.devcontainer/postCreateCommand.sh b/.devcontainer/postCreateCommand.sh
index d8f50136..a59fbfbf 100755
--- a/.devcontainer/postCreateCommand.sh
+++ b/.devcontainer/postCreateCommand.sh
@@ -1,9 +1,16 @@
 #!/bin/sh
 
 export PATH="$PATH:$HOME/.composer/vendor/bin"
+export PATH="$PATH:$PWD/vendor/bin"
+echo 'export PATH="$PATH:$HOME/.composer/vendor/bin"' >> ~/.bashrc
+echo 'export PATH="$PATH:$PWD/vendor/bin"' >> ~/.bashrc
 ln -s ./conf.sample.php cfg/conf.php
 composer install --no-dev --optimize-autoloader
 
+# for PHP unit testing
+# composer require google/cloud-storage
+# composer install --optimize-autoloader
+
 sudo chmod a+x "$(pwd)" && sudo rm -rf /var/www/html && sudo ln -s "$(pwd)" /var/www/html
 
 npm install --global nyc
diff --git a/.github/workflows/snyk-scan.yml b/.github/workflows/snyk-scan.yml
index 72e58de3..851211f2 100644
--- a/.github/workflows/snyk-scan.yml
+++ b/.github/workflows/snyk-scan.yml
@@ -12,7 +12,12 @@ jobs:
   # https://github.com/snyk/actions/tree/master/php
   snyk-php:
     runs-on: ubuntu-latest
-    if: ${{ github.repository == 'PrivateBin/PrivateBin' }}
+    if: |
+      github.repository == 'PrivateBin/PrivateBin' && (
+      github.event.pull_request.author_association == 'COLLABORATOR' ||
+      github.event.pull_request.author_association == 'CONTRIBUTOR' ||
+      github.event.pull_request.author_association == 'MEMBER' ||
+      github.event.pull_request.author_association == 'OWNER' )
     steps:
       - uses: actions/checkout@v5
       - name: Install Google Cloud Storage
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 01cfdbb4..a33660b2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,6 +1,8 @@
 name: Tests
 on:
   push:
+  pull_request:
+    branches: [ master ]
   workflow_dispatch:
 
 jobs:
diff --git a/.gitignore b/.gitignore
index 07ce26ed..09ca72e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,6 +25,7 @@ vendor/**/tst
 vendor/**/tests
 vendor/**/build_phar.php
 !vendor/**/*.php
+vendor/bin/**
 
 # Ignore local node modules, unit testing logs, api docs and IDE project files
 js/node_modules/
diff --git a/i18n/fr.json b/i18n/fr.json
index 180cb00e..d5715d4b 100644
--- a/i18n/fr.json
+++ b/i18n/fr.json
@@ -224,7 +224,7 @@
     "Error decompressing document, your browser does not support WebAssembly. Please use another browser to view this document.": "Erreur lors de la décompression du document, votre navigateur ne supporte pas WebAssembly. Veuillez utiliser un autre navigateur pour voir ce document.",
     "Start over": "Recommencer",
     "Document copied to clipboard": "Document copié dans le presse-papier",
-    "To copy document press on the copy button or use the clipboard shortcut <kbd>Ctrl</kbd>+<kbd>c</kbd>/<kbd>Cmd</kbd>+<kbd>c</kbd>": "Pour copier-coller appuyer sur le bouton To copy document press on the copy button or use the clipboard shortcut <kbd>Ctrl</kbd>+<kbd>c</kbd>/<kbd>Cmd</kbd>+<kbd>c</kbd>",
+    "To copy document press on the copy button or use the clipboard shortcut <kbd>Ctrl</kbd>+<kbd>c</kbd>/<kbd>Cmd</kbd>+<kbd>c</kbd>": "Pour copier appuyer sur le bouton Copier le lien ou utiliser le raccourci <kbd>Ctrl</kbd>+<kbd>c</kbd>/<kbd>Cmd</kbd>+<kbd>c</kbd>",
     "Copy link": "Copier le lien",
     "Link copied to clipboard": "Lien copié dans le presse-papier",
     "Document text": "Texte du document",
diff --git a/js/legacy.js b/js/legacy.js
index 5d6dbc0b..1f27107b 100644
--- a/js/legacy.js
+++ b/js/legacy.js
@@ -106,8 +106,8 @@
                 return window.isSecureContext;
             }
 
-            // HTTP is obviously insecure
-            if (window.location.protocol !== 'http:') {
+            // HTTPS is considered secure
+            if (window.location.protocol === 'https:') {
                 return true;
             }
 
diff --git a/js/privatebin.js b/js/privatebin.js
index c3394daf..15531838 100644
--- a/js/privatebin.js
+++ b/js/privatebin.js
@@ -930,7 +930,8 @@ jQuery.PrivateBin = (function($) {
             }
 
             // load strings from JSON
-            $.getJSON('i18n/' + newLanguage + '.json', function(data) {
+            const cacheBreaker = document.querySelector('script[src^="js/privatebin.js"]').getAttribute('src').split('.js')[1] || '';
+            $.getJSON('i18n/' + newLanguage + '.json' + cacheBreaker, function(data) {
                 language = newLanguage;
                 translations = data;
                 $(document).triggerHandler(languageLoadedEvent);
@@ -5160,7 +5161,7 @@ jQuery.PrivateBin = (function($) {
 
             // UI loading state
             TopNav.hideAllButtons();
-            Alert.showLoading('Sending paste…', 'cloud-upload');
+            Alert.showLoading('Sending document…', 'cloud-upload');
             TopNav.collapseBar();
 
             // get data
@@ -5431,7 +5432,7 @@ jQuery.PrivateBin = (function($) {
         {
             Alert.hideMessages();
             Alert.setCustomHandler(null);
-            Alert.showLoading('Decrypting paste…', 'cloud-download');
+            Alert.showLoading('Decrypting document…', 'cloud-download');
 
             if (typeof paste === 'undefined' || paste.type === 'click') {
                 // get cipher data and wait until it is available
@@ -5776,7 +5777,7 @@ jQuery.PrivateBin = (function($) {
             // Important: This *must not* run Alert.hideMessages() as previous
             // errors from viewing a document should be shown.
             TopNav.hideAllButtons();
-            Alert.showLoading('Preparing new paste…', 'time');
+            Alert.showLoading('Preparing new document…', 'time');
 
             PasteStatus.hideMessages();
             PasteViewer.hide();
diff --git a/lib/Configuration.php b/lib/Configuration.php
index 56fdac3b..cc06e930 100644
--- a/lib/Configuration.php
+++ b/lib/Configuration.php
@@ -119,9 +119,9 @@ class Configuration
             'js/dark-mode-switch.js' => 'sha512-BhY7dNU14aDN5L+muoUmA66x0CkYUWkQT0nxhKBLP/o2d7jE025+dvWJa4OiYffBGEFgmhrD/Sp+QMkxGMTz2g==',
             'js/jquery-3.7.1.js'     => 'sha512-v2CJ7UaYy4JwqLDIrZUI/4hqeoQieOmAZNXBeQyjo21dadnwR+8ZaIJVT8EE2iyI61OV8e6M8PP2/4hpQINQ/g==',
             'js/kjua-0.10.0.js'      => 'sha512-BYj4xggowR7QD150VLSTRlzH62YPfhpIM+b/1EUEr7RQpdWAGKulxWnOvjFx1FUlba4m6ihpNYuQab51H6XlYg==',
-            'js/legacy.js'           => 'sha512-08+subq1Lo+r+la5ENqeXiMgNJcVaaTtBIFGkrjziSpvtgCId3Jtin4/OkSdHYSoeztwwIab8uvCzPKHta6puQ==',
+            'js/legacy.js'           => 'sha512-mXAgFn/DonfPANvPO6Kf08zRKCeQ75jXK69gcUUOpPLFkp3KHnDhnvij8nEJxlutD/670Bfi4RNMG6uEjA4nNQ==',
             'js/prettify.js'         => 'sha512-puO0Ogy++IoA2Pb9IjSxV1n4+kQkKXYAEUtVzfZpQepyDPyXk8hokiYDS7ybMogYlyyEIwMLpZqVhCkARQWLMg==',
-            'js/privatebin.js'       => 'sha512-seF8mXWh9E9SBK0qWNfm8RTGneGc05QpDcPyeTk+sg6efB6Edhiu6mvbSDCM4zb/gFqeko7jTYcUSYxhs3UIaA==',
+            'js/privatebin.js'       => 'sha512-nMz7sgy/jMKXKAUDcZcsUdVEuKN89Fgf0mvD7DB70pI4R6ExJwCOWaiQTc/czhVVUEwKzbhWrJG/hX2Tqhe5QA==',
             'js/purify-3.2.6.js'     => 'sha512-zqwL4OoBLFx89QPewkz4Lz5CSA2ktU+f31fuECkF0iK3Id5qd3Zpq5dMby8KwHjIEpsUgOqwF58cnmcaNem0EA==',
             'js/showdown-2.1.0.js'   => 'sha512-WYXZgkTR0u/Y9SVIA4nTTOih0kXMEd8RRV6MLFdL6YU8ymhR528NLlYQt1nlJQbYz4EW+ZsS0fx1awhiQJme1Q==',
             'js/zlib-1.3.1-1.js'     => 'sha512-5bU9IIP4PgBrOKLZvGWJD4kgfQrkTz8Z3Iqeu058mbQzW3mCumOU6M3UVbVZU9rrVoVwaW4cZK8U8h5xjF88eQ==',
diff --git a/lib/Proxy/AbstractProxy.php b/lib/Proxy/AbstractProxy.php
index 77e918ff..e45f5377 100644
--- a/lib/Proxy/AbstractProxy.php
+++ b/lib/Proxy/AbstractProxy.php
@@ -49,7 +49,14 @@ abstract class AbstractProxy
      */
     public function __construct(Configuration $conf, string $link)
     {
-        if (!str_starts_with($link, $conf->getKey('basepath') . '?')) {
+        if (!filter_var($link, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED | FILTER_FLAG_QUERY_REQUIRED)) {
+            $this->_error = 'Invalid URL given.';
+            return;
+        }
+
+        if (!str_starts_with($link, $conf->getKey('basepath') . '?') ||
+            parse_url($link, PHP_URL_HOST) != parse_url($conf->getKey('basepath'), PHP_URL_HOST)
+        ) {
             $this->_error = 'Trying to shorten a URL that isn\'t pointing at our instance.';
             return;
         }
diff --git a/tst/YourlsProxyTest.php b/tst/YourlsProxyTest.php
index 9ceeea35..a4a87bd9 100644
--- a/tst/YourlsProxyTest.php
+++ b/tst/YourlsProxyTest.php
@@ -45,22 +45,76 @@ class YourlsProxyTest extends TestCase
         $yourls = new YourlsProxy($this->_conf, 'https://example.com/?foo#bar');
         $this->assertFalse($yourls->isError());
         $this->assertEquals($yourls->getUrl(), 'https://example.com/1');
+
+        $yourls = new YourlsProxy($this->_conf, 'https://example.com/?@foreign.malicious.example?foo#bar');
+        $this->assertFalse($yourls->isError());
+        $this->assertEquals($yourls->getUrl(), 'https://example.com/1');
     }
 
-    public function testForeignUrl()
+    /**
+     * @dataProvider providerInvalidUrl
+     */
+    public function testImvalidUrl($url): void
     {
-        $yourls = new YourlsProxy($this->_conf, 'https://other.example.com/?foo#bar');
+        $yourls = new YourlsProxy($this->_conf, $url);
+        $this->assertTrue($yourls->isError());
+        $this->assertEquals($yourls->getError(), 'Invalid URL given.');
+    }
+
+    public function providerInvalidUrl(): array
+    {
+        return array(
+            array(''),
+            array(' '),
+            array('foo'),
+            array('https://'),
+            array('https://example.com'), // missing path and query parameter,
+            array('https://example.com/'), // missing query parameter
+            array('https://example.com?paste=something'), // missing path parameter
+            array('https://example.com@foreign.malicious.example?foo#bar'), // missing path parameter
+        );
+    }
+
+    /**
+     * This tests for a trick using username of an URI, see:
+     * {@see https://cloud.google.com/blog/topics/threat-intelligence/url-obfuscation-schema-abuse/?hl=en}
+     *
+     * @dataProvider providerForeignUrlUsernameTrick
+     */
+    public function testForeignUrlUsingUsernameTrick($url): void
+    {
+        $yourls = new YourlsProxy($this->_conf, $url);
         $this->assertTrue($yourls->isError());
         $this->assertEquals($yourls->getError(), 'Trying to shorten a URL that isn\'t pointing at our instance.');
     }
 
-    public function testSneakyForeignUrl()
+    public function providerForeignUrlUsernameTrick(): array
     {
-        $yourls = new YourlsProxy($this->_conf, 'https://other.example.com/?q=https://example.com/?foo#bar');
+        return array(
+            array('https://example.com@foreign.malicious.example/?foo#bar'),
+            array('https://example.com/@foreign.malicious.example?foo#bar'),
+        );
+    }
+
+    /**
+     * @dataProvider providerForeignUrl
+     */
+    public function testForeignUrl($url): void
+    {
+        $yourls = new YourlsProxy($this->_conf, $url);
         $this->assertTrue($yourls->isError());
         $this->assertEquals($yourls->getError(), 'Trying to shorten a URL that isn\'t pointing at our instance.');
     }
 
+    public function providerForeignUrl(): array
+    {
+        return array(
+            array('ftp://example.com/?n=np'), // wrong protocol
+            array('https://other.example.com/?foo#bar'), // wrong domain
+            array('https://other.example.com/?q=https://example.com/?foo#bar'), // domain included inside string
+        );
+    }
+
     public function testYourlsError()
     {
         // when statusCode is not 200, shorturl may not have been set