diff --git a/Diagnostic/CurlVersionCheck.php b/Diagnostic/CurlVersionCheck.php
new file mode 100644
index 0000000..3526eee
--- /dev/null
+++ b/Diagnostic/CurlVersionCheck.php
@@ -0,0 +1,110 @@
+<?php
+/**
+ * Matomo - free/libre analytics platform
+ *
+ * @link https://matomo.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik\Plugins\DiagnosticsExtended\Diagnostic;
+
+use Piwik\Http;
+use Piwik\Plugins\Diagnostics\Diagnostic\Diagnostic;
+use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResult;
+use Psr\Log\LoggerInterface;
+
+class CurlVersionCheck implements Diagnostic
+{
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+    /**
+     * @var string
+     */
+    private $label;
+
+    const SOCKET_TIMEOUT = 2;
+    const CACHEID = "DiagnosticsExtended_CurlVulnerabilities";
+
+    /**
+     * @var \Matomo\Cache\Lazy
+     */
+    private $lazyCache;
+
+
+    public function __construct(LoggerInterface $logger, \Matomo\Cache\Lazy $lazyCache)
+    {
+        $this->logger = $logger;
+        $this->label = "curl version check";
+        $this->lazyCache = $lazyCache;
+    }
+
+
+    /**
+     * @return DiagnosticResult[]
+     */
+    public function execute()
+    {
+        if (!extension_loaded('curl')) {
+            return [DiagnosticResult::singleResult(
+                $this->label,
+                DiagnosticResult::STATUS_INFORMATIONAL,
+                "Your PHP setup doesn't use curl, so there is nothing to check"
+            )];
+        }
+        $version = curl_version()["version"];
+
+        $url = "https://curl.se/docs/vuln.pm";
+        $timeout = self::SOCKET_TIMEOUT;
+        try {
+            $response = $this->lazyCache->fetch(self::CACHEID);
+            if (!$response) {
+                $response = Http::sendHttpRequest($url, $timeout);
+                $this->lazyCache->save(self::CACHEID, $response, 60 * 60 * 24 * 7);
+            }
+            $vulns = [];
+            foreach (explode("\n", $response) as $line) {
+                $line = trim($line);
+                if (strpos($line, "#") === 0 || strpos($line, "@") === 0 || strpos($line, ")") === 0) {
+                    continue;
+                }
+                $line = str_replace('"', "", $line);
+                $cols = explode("|", $line);
+                $startVersion = $cols[1];
+                $endVersion = $cols[2];
+                $URL = htmlspecialchars($cols[0], ENT_QUOTES, 'UTF-8');
+                $CVE = htmlspecialchars($cols[4], ENT_QUOTES, 'UTF-8');
+                if (
+                    version_compare($version, $startVersion, ">=") &&
+                    version_compare($version, $endVersion, "<=")
+                ) {
+                    $vulns[] = "<a target='_blank' rel='noopener' href='https://curl.se/docs/$URL'>$CVE</a>";
+                }
+            }
+            if (count($vulns) > 0) {
+                return [DiagnosticResult::singleResult(
+                    $this->label,
+                    DiagnosticResult::STATUS_ERROR,
+                    "Your curl version might be vulnerable against this vulnerabilities 
+                    (unless the distributor of your curl binary is backporting security patches): "
+                    . join(", ", $vulns)
+                )];
+            } else {
+                return [DiagnosticResult::singleResult(
+                    $this->label,
+                    DiagnosticResult::STATUS_OK,
+                    "It seems like there are no known vulnerabilities in your curl version"
+                )];
+            }
+        } catch (\Exception $e) {
+            return [DiagnosticResult::singleResult(
+                $this->label,
+                DiagnosticResult::STATUS_INFORMATIONAL,
+                "Matomo could not check if your curl version has vulnerabilities"
+            )];
+        }
+
+
+    }
+}
diff --git a/Diagnostic/DatabaseVersionCheck.php b/Diagnostic/DatabaseVersionCheck.php
index c4a76eb..3094bc7 100644
--- a/Diagnostic/DatabaseVersionCheck.php
+++ b/Diagnostic/DatabaseVersionCheck.php
@@ -8,15 +8,13 @@
 
 namespace Piwik\Plugins\DiagnosticsExtended\Diagnostic;
 
+use Piwik\Date;
 use Piwik\Db;
 use Piwik\Http;
-use Piwik\Date;
 use Piwik\Plugins\Diagnostics\Diagnostic\Diagnostic;
 use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResult;
 use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResultItem;
-use Piwik\Plugins\DiagnosticsExtended\Diagnostic\IniSettings\IniSetting;
 use Psr\Log\LoggerInterface;
-use function DI\factory;
 
 class DatabaseVersionCheck implements Diagnostic
 {
diff --git a/Diagnostic/ExampleCheck.php b/Diagnostic/ExampleCheck.php
index d619a7d..1d847f3 100644
--- a/Diagnostic/ExampleCheck.php
+++ b/Diagnostic/ExampleCheck.php
@@ -27,9 +27,11 @@ class ExampleCheck implements Diagnostic
 
     public function execute()
     {
-        $result=new DiagnosticResult("label");
-        $result->addItem(new DiagnosticResultItem(DiagnosticResult::STATUS_ERROR,"a"));
-        $result->addItem(new DiagnosticResultItem(DiagnosticResult::STATUS_OK,"b"));
+        $result = new DiagnosticResult("label");
+        $result->addItem(new DiagnosticResultItem(DiagnosticResult::STATUS_ERROR, "error"));
+        $result->addItem(new DiagnosticResultItem(DiagnosticResult::STATUS_WARNING, "warning"));
+        $result->addItem(new DiagnosticResultItem(DiagnosticResult::STATUS_OK, "okay"));
+        $result->addItem(new DiagnosticResultItem(DiagnosticResult::STATUS_INFORMATIONAL, "info"));
         return array($result);
     }
 
diff --git a/Diagnostic/GzipMatomoJsCheck.php b/Diagnostic/GzipMatomoJsCheck.php
index 81e086f..c0ddd7c 100644
--- a/Diagnostic/GzipMatomoJsCheck.php
+++ b/Diagnostic/GzipMatomoJsCheck.php
@@ -8,17 +8,13 @@
 
 namespace Piwik\Plugins\DiagnosticsExtended\Diagnostic;
 
-use Piwik\Db;
 use Piwik\Http;
-use Piwik\Date;
 use Piwik\Plugins\Diagnostics\Diagnostic\Diagnostic;
 use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResult;
 use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResultItem;
-use Piwik\Plugins\DiagnosticsExtended\Diagnostic\IniSettings\IniSetting;
 use Piwik\SettingsPiwik;
 use Piwik\Tracker\TrackerCodeGenerator;
 use Psr\Log\LoggerInterface;
-use function DI\factory;
 
 class GzipMatomoJsCheck implements Diagnostic
 {
diff --git a/Diagnostic/OpensslVersionCheck.php b/Diagnostic/OpensslVersionCheck.php
new file mode 100644
index 0000000..9da8cf7
--- /dev/null
+++ b/Diagnostic/OpensslVersionCheck.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Matomo - free/libre analytics platform
+ *
+ * @link https://matomo.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik\Plugins\DiagnosticsExtended\Diagnostic;
+
+use Piwik\Plugins\Diagnostics\Diagnostic\Diagnostic;
+use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResult;
+use Psr\Log\LoggerInterface;
+
+class OpensslVersionCheck implements Diagnostic
+{
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+    /**
+     * @var string
+     */
+    private $label;
+
+    /**
+     * Use a rather old version as many security fixes are backported
+     */
+    const MINIMUM_VERSION = "1.0.2";
+    const MINIMUM_VERSION_LETTER = "b";
+
+
+    public function __construct(LoggerInterface $logger)
+    {
+        $this->logger = $logger;
+        $this->label = "OpenSSL version check";
+    }
+
+    /**
+     * @return DiagnosticResult
+     */
+    public function noOpenSSL()
+    {
+        return DiagnosticResult::singleResult(
+            $this->label,
+            DiagnosticResult::STATUS_INFORMATIONAL,
+            "Your PHP setup doesn't use OpenSSL or curl, so there is nothing to check"
+        );
+    }
+
+
+    /**
+     * @return DiagnosticResult[]
+     */
+    public function execute()
+    {
+        if (!extension_loaded("curl") || !extension_loaded('openssl')) {
+            return [$this->noOpenSSL()];
+        }
+        $version = curl_version()["ssl_version"];
+        if (strpos($version, "OpenSSL/") !== 0) {
+            return [$this->noOpenSSL()];
+        }
+        $versionPart = substr($version, 8, 5);
+        $letterPart = substr($version, 13, 1);
+        if (
+            version_compare($versionPart, self::MINIMUM_VERSION, "<")
+            || (
+                version_compare($versionPart, self::MINIMUM_VERSION, "=")
+                && ord($letterPart) < ord(self::MINIMUM_VERSION_LETTER)
+            )
+        ) {
+            return [DiagnosticResult::singleResult(
+                $this->label,
+                DiagnosticResult::STATUS_WARNING,
+                "Your OpenSSL version ($version) is pretty old. 
+                Check if there are known vulnerabilities for it and update it if necessary."
+            )];
+        } else {
+            return [DiagnosticResult::singleResult(
+                $this->label,
+                DiagnosticResult::STATUS_INFORMATIONAL,
+                "Your OpenSSL version ($version) is not really old. 
+                Nevertheless, check if there are known vulnerabilities for it and update it if necessary."
+            )];
+        }
+    }
+}
diff --git a/Diagnostic/PhpUserCheck.php b/Diagnostic/PhpUserCheck.php
new file mode 100644
index 0000000..fb01cc2
--- /dev/null
+++ b/Diagnostic/PhpUserCheck.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ * Matomo - free/libre analytics platform
+ *
+ * @link https://matomo.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik\Plugins\DiagnosticsExtended\Diagnostic;
+
+use Piwik\Plugins\Diagnostics\Diagnostic\Diagnostic;
+use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResult;
+use Piwik\SettingsServer;
+use Psr\Log\LoggerInterface;
+
+class PhpUserCheck implements Diagnostic
+{
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
+    public function __construct(LoggerInterface $logger)
+    {
+        $this->logger = $logger;
+    }
+
+    /**
+     * @return DiagnosticResult[]
+     */
+    public function execute()
+    {
+        if (SettingsServer::isWindows()) {
+            return [];
+        }
+        if (posix_getuid() === 0) {
+            return [DiagnosticResult::singleResult(
+                "php running as root",
+                DiagnosticResult::STATUS_WARNING,
+                "PHP seems to be running as root. Unless you are using Matomo inside a docker container
+                you should check your setup."
+            )];
+        }
+        return [];
+    }
+
+
+}
diff --git a/Diagnostic/PhpVersionCheck.php b/Diagnostic/PhpVersionCheck.php
index e2e97e0..24fd919 100644
--- a/Diagnostic/PhpVersionCheck.php
+++ b/Diagnostic/PhpVersionCheck.php
@@ -8,14 +8,12 @@
 
 namespace Piwik\Plugins\DiagnosticsExtended\Diagnostic;
 
-use Piwik\Http;
 use Piwik\Date;
+use Piwik\Http;
 use Piwik\Plugins\Diagnostics\Diagnostic\Diagnostic;
 use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResult;
 use Piwik\Plugins\Diagnostics\Diagnostic\DiagnosticResultItem;
-use Piwik\Plugins\DiagnosticsExtended\Diagnostic\IniSettings\IniSetting;
 use Psr\Log\LoggerInterface;
-use function DI\factory;
 
 class PhpVersionCheck implements Diagnostic
 {
diff --git a/config/config.php b/config/config.php
index 42f584c..26c8bc9 100644
--- a/config/config.php
+++ b/config/config.php
@@ -15,6 +15,9 @@ return [
         DI\get('\Piwik\Plugins\DiagnosticsExtended\Diagnostic\PhpVersionCheck'),
         DI\get('\Piwik\Plugins\DiagnosticsExtended\Diagnostic\DatabaseVersionCheck'),
         DI\get('\Piwik\Plugins\DiagnosticsExtended\Diagnostic\GzipMatomoJsCheck'),
+        DI\get('\Piwik\Plugins\DiagnosticsExtended\Diagnostic\CurlVersionCheck'),
+        DI\get('\Piwik\Plugins\DiagnosticsExtended\Diagnostic\OpensslVersionCheck'),
+        DI\get('\Piwik\Plugins\DiagnosticsExtended\Diagnostic\PhpUserCheck'),
     ]),
 
 ];