diff --git a/CHANGELOG.md b/CHANGELOG.md
index 94a90280d4a..48bebdef91c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -103,6 +103,7 @@
 - Fixed a bug where typing an option’s exact label or value into a combobox that accepts free text could make two options look selected. Exact matches are now listed first.
 - Fixed a bug where rich selects’ menus could extend off-screen when an option had a long label or hint, and a long option could stretch the select itself past its container.
 - Fixed a bug where permission trees, such as user group permissions and the public MCP settings, used the browser’s native checkboxes instead of the control panel’s checkbox styling.
+- Fixed a bug where logging in from the control panel’s login page could redirect to the front end instead of the control panel, when a front-end login path was also configured.
 - Fixed a bug where element edit pages could have a few pixels of vertical scroll after the window was resized, even though their content fit within it. ([#20028](https://github.com/craftcms/cms/pull/20028))
 - Fixed a bug where control panel pages and details panes shifted sideways when a scrollbar appeared. ([#20030](https://github.com/craftcms/cms/pull/20030))
 
diff --git a/routes/cp.php b/routes/cp.php
index 037194fe3d2..df9eecaab04 100644
--- a/routes/cp.php
+++ b/routes/cp.php
@@ -109,7 +109,7 @@
 
 Route::allowDuringMaintenance()->middleware(RunQueue::class)->group(function () {
     Route::get(CpAuthPath::Login->value, [LoginController::class, 'showLogin']);
-    Route::post(CpAuthPath::Login->value, [LoginController::class, 'attemptLogin'])->middleware('throttle:'.LoginRateLimiter::NAME);
+    Route::post(CpAuthPath::Login->value, [LoginController::class, 'attemptLogin'])->middleware('throttle:'.LoginRateLimiter::NAME)->name('login.attempt');
     Route::match(['get', 'post'], CpAuthPath::Logout->value, [LoginController::class, 'logout'])->name('logout');
     Route::get(CpAuthPath::TwoFactorChallenge->value, [TwoFactorAuthenticationController::class, 'showForm'])->middleware(EnsureTwoFactorChallengeIsRecent::class);
     Route::get(CpAuthPath::SetPassword->value, [SetPasswordController::class, 'show']);
diff --git a/src/Http/Controllers/Auth/LoginController.php b/src/Http/Controllers/Auth/LoginController.php
index 12adda1bc1b..68b3e9157e9 100644
--- a/src/Http/Controllers/Auth/LoginController.php
+++ b/src/Http/Controllers/Auth/LoginController.php
@@ -65,10 +65,10 @@ public function showLogin(Request $request, GeneralConfig $generalConfig, AuthMe
             inertiaProps: [
                 'username' => $generalConfig->rememberUsernameDuration ? $authMethods->getRememberedUsername() : '',
                 'oauthLoginButtons' => $oauthLoginButtons,
-                'action' => $request->isCpRequest() ? action([self::class, 'attemptLogin']) : action_url('users/login'),
+                'action' => $request->isCpRequest() ? route('craft.cp.login.attempt') : action_url('users/login'),
             ],
             data: [
-                'action' => action([self::class, 'attemptLogin']),
+                'action' => $request->isCpRequest() ? route('craft.cp.login.attempt') : action([self::class, 'attemptLogin']),
                 'oauthLoginButtons' => $oauthLoginButtons,
             ],
         );
@@ -103,7 +103,7 @@ public function showLoginModal(Request $request, Impersonation $impersonation, H
         }
 
         $html = template('_special/login-modal', [
-            'action' => action([LoginController::class, 'attemptLogin']),
+            'action' => route('craft.cp.login.attempt'),
             'staticEmail' => $staticEmail,
             'forElevatedSession' => $forElevatedSession,
         ], templateMode: TemplateMode::Cp);
diff --git a/src/Http/Controllers/Auth/SessionInfoController.php b/src/Http/Controllers/Auth/SessionInfoController.php
index 9ecb88e15ab..6856ef710fa 100644
--- a/src/Http/Controllers/Auth/SessionInfoController.php
+++ b/src/Http/Controllers/Auth/SessionInfoController.php
@@ -88,7 +88,7 @@ public function confirmPassword(
         $loginName = (string) ($user->email ?? $user->username);
         $context = [
             ...$templateGlobals->resolve(),
-            'action' => action([LoginController::class, 'attemptLogin']),
+            'action' => route('craft.cp.login.attempt'),
             'forElevatedSession' => true,
             'generalConfig' => $generalConfig,
             'staticEmail' => $loginName,
diff --git a/tests/Feature/Http/Controllers/Auth/LoginControllerTest.php b/tests/Feature/Http/Controllers/Auth/LoginControllerTest.php
index 2577400f219..39a9ab8c24b 100644
--- a/tests/Feature/Http/Controllers/Auth/LoginControllerTest.php
+++ b/tests/Feature/Http/Controllers/Auth/LoginControllerTest.php
@@ -170,6 +170,21 @@
     expect(Auth::id())->toBe($user->id);
 });
 
+test('control panel logins post to the control panel and redirect to the post-CP-login redirect', function () {
+    // A front-end login path is another route to the same action, so URLs generated from the action could point there.
+    Route::post('logmein', [LoginController::class, 'attemptLogin']);
+    Route::getRoutes()->refreshActionLookups();
+    Cms::config()->postCpLoginRedirect = 'entries';
+
+    get(cp_url(CpAuthPath::Login->value))
+        ->assertInertia(fn (AssertableInertia $page) => $page->where('action', cp_url(CpAuthPath::Login->value)));
+
+    post(cp_url(CpAuthPath::Login->value), [
+        'loginName' => User::findOne()->email,
+        'password' => 'craftcms2018!!',
+    ])->assertRedirect(cp_url('entries'));
+});
+
 test('modal login requires refreshing the token before resubmitting a form', function (bool $authenticated) {
     // Laravel skips CSRF verification in the testing environment.
     $this->app->instance('env', 'local');