diff --git a/includes/FancyCaptcha/FancyCaptcha.php b/includes/FancyCaptcha/FancyCaptcha.php
index e208e7014..1aef8fe1b 100644
--- a/includes/FancyCaptcha/FancyCaptcha.php
+++ b/includes/FancyCaptcha/FancyCaptcha.php
@@ -443,12 +443,12 @@ class FancyCaptcha extends SimpleCaptcha {
 	 * Delete a solved captcha image, if $wgCaptchaDeleteOnSolve is true.
 	 * @inheritDoc
 	 */
-	protected function passCaptcha( $index, $word ) {
+	protected function passCaptcha( $index, $word, $user ) {
 		global $wgCaptchaDeleteOnSolve;
 
 		// get the captcha info before it gets deleted
 		$info = $this->retrieveCaptcha( $index );
-		$pass = parent::passCaptcha( $index, $word );
+		$pass = parent::passCaptcha( $index, $word, $user );
 
 		if ( $pass && $wgCaptchaDeleteOnSolve ) {
 			$this->getBackend()->quickDelete( [
diff --git a/includes/ReCaptchaNoCaptcha/ReCaptchaNoCaptcha.php b/includes/ReCaptchaNoCaptcha/ReCaptchaNoCaptcha.php
index 5ee4d47fd..5983a517c 100644
--- a/includes/ReCaptchaNoCaptcha/ReCaptchaNoCaptcha.php
+++ b/includes/ReCaptchaNoCaptcha/ReCaptchaNoCaptcha.php
@@ -14,6 +14,7 @@ use MediaWiki\MediaWikiServices;
 use MediaWiki\Message\Message;
 use MediaWiki\Request\WebRequest;
 use MediaWiki\Status\Status;
+use MediaWiki\User\UserIdentity;
 
 class ReCaptchaNoCaptcha extends SimpleCaptcha {
 	/**
@@ -122,9 +123,10 @@ HTML;
 	 *
 	 * @param mixed $_ Not used (ReCaptcha v2 puts index and solution in a single string)
 	 * @param string $word captcha solution
+	 * @param UserIdentity $user
 	 * @return bool
 	 */
-	protected function passCaptcha( $_, $word ) {
+	protected function passCaptcha( $_, $word, $user ) {
 		global $wgRequest, $wgReCaptchaSecretKey, $wgReCaptchaSendRemoteIP;
 
 		$url = 'https://www.recaptcha.net/recaptcha/api/siteverify';
diff --git a/includes/SimpleCaptcha/SimpleCaptcha.php b/includes/SimpleCaptcha/SimpleCaptcha.php
index 2ed68d4e3..cb97da1b0 100644
--- a/includes/SimpleCaptcha/SimpleCaptcha.php
+++ b/includes/SimpleCaptcha/SimpleCaptcha.php
@@ -1026,7 +1026,7 @@ class SimpleCaptcha {
 			return false;
 		}
 
-		if ( $this->passCaptcha( $index, $word ) ) {
+		if ( $this->passCaptcha( $index, $word, $user ) ) {
 			return true;
 		}
 
@@ -1044,17 +1044,18 @@ class SimpleCaptcha {
 	 */
 	public function passCaptchaFromRequest( WebRequest $request, User $user ) {
 		[ $index, $word ] = $this->getCaptchaParamsFromRequest( $request );
-		return $this->passCaptcha( $index, $word );
+		return $this->passCaptcha( $index, $word, $user );
 	}
 
 	/**
 	 * Given a required captcha run, test form input for correct
 	 * input on the open session.
-	 * @param string $index Captcha idenitifier
+	 * @param string $index Captcha identifier
 	 * @param string $word Captcha solution
+	 * @param User $user
 	 * @return bool if passed, false if failed or new session
 	 */
-	protected function passCaptcha( $index, $word ) {
+	protected function passCaptcha( $index, $word, $user ) {
 		// Don't check the same CAPTCHA twice in one session,
 		// if the CAPTCHA was already checked - Bug T94276
 		if ( $this->isCaptchaSolved() !== null ) {
diff --git a/includes/Turnstile/Turnstile.php b/includes/Turnstile/Turnstile.php
index 6cc090b97..1db726ccc 100644
--- a/includes/Turnstile/Turnstile.php
+++ b/includes/Turnstile/Turnstile.php
@@ -14,6 +14,7 @@ use MediaWiki\MediaWikiServices;
 use MediaWiki\Message\Message;
 use MediaWiki\Request\WebRequest;
 use MediaWiki\Status\Status;
+use MediaWiki\User\UserIdentity;
 
 class Turnstile extends SimpleCaptcha {
 	/**
@@ -98,9 +99,10 @@ class Turnstile extends SimpleCaptcha {
 	 *
 	 * @param mixed $_ Not used
 	 * @param string $word captcha solution
+	 * @param UserIdentity $user
 	 * @return bool
 	 */
-	protected function passCaptcha( $_, $word ) {
+	protected function passCaptcha( $_, $word, $user ) {
 		global $wgRequest, $wgTurnstileSecretKey, $wgTurnstileSendRemoteIP;
 
 		$url = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
diff --git a/includes/hCaptcha/HCaptcha.php b/includes/hCaptcha/HCaptcha.php
index eddd9d48e..2eb6941e4 100644
--- a/includes/hCaptcha/HCaptcha.php
+++ b/includes/hCaptcha/HCaptcha.php
@@ -12,11 +12,13 @@ use MediaWiki\Extension\ConfirmEdit\SimpleCaptcha\SimpleCaptcha;
 use MediaWiki\Html\Html;
 use MediaWiki\Json\FormatJson;
 use MediaWiki\Language\RawMessage;
+use MediaWiki\Logger\LoggerFactory;
 use MediaWiki\MediaWikiServices;
 use MediaWiki\Message\Message;
 use MediaWiki\Request\ContentSecurityPolicy;
 use MediaWiki\Request\WebRequest;
 use MediaWiki\Status\Status;
+use MediaWiki\User\UserIdentity;
 
 class HCaptcha extends SimpleCaptcha {
 	/**
@@ -119,9 +121,10 @@ class HCaptcha extends SimpleCaptcha {
 	 *
 	 * @param mixed $_ Not used
 	 * @param string $token token from the POST data
+	 * @param UserIdentity $user
 	 * @return bool
 	 */
-	protected function passCaptcha( $_, $token ) {
+	protected function passCaptcha( $_, $token, $user ) {
 		$webRequest = RequestContext::getMain()->getRequest();
 
 		$secretKey = $this->hCaptchaConfig->get( 'HCaptchaSecretKey' );
@@ -155,7 +158,8 @@ class HCaptcha extends SimpleCaptcha {
 			$this->logCheckError( $status );
 			return false;
 		}
-		$response = FormatJson::decode( $request->getContent(), true );
+		$json = $request->getContent();
+		$response = FormatJson::decode( $json, true );
 		if ( !$response ) {
 			$this->error = 'json';
 			$this->logCheckError( $this->error );
@@ -167,6 +171,14 @@ class HCaptcha extends SimpleCaptcha {
 			return false;
 		}
 
+		LoggerFactory::getInstance( 'captcha' )
+			->debug( 'Captcha solution attempt for {user}', [
+				'event' => 'captcha.solve',
+				'user' => $user->getName(),
+				'success' => $response['success'],
+				'blob' => $json,
+			] );
+
 		return $response['success'];
 	}