diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index edcb9f4c34..d5b3e0be8a 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -1756,50 +1756,87 @@ class Probe
 	}
 
 	/**
-	 * Check page for feed link
+	 * Checks HTML page for RSS feed link
 	 *
-	 * @param string $url Page link
-	 *
-	 * @return string feed link
+	 * @param string $url  Page link
+	 * @param string $body Page body string
+	 * @return string|false Feed link or false if body was invalid HTML document
 	 */
-	private static function getFeedLink($url)
+	public static function getFeedLink(string $url, string $body)
 	{
-		$curlResult = Network::curl($url);
-		if (!$curlResult->isSuccess()) {
-			return false;
-		}
-
 		$doc = new DOMDocument();
-		if (!@$doc->loadHTML($curlResult->getBody())) {
+		if (!@$doc->loadHTML($body)) {
 			return false;
 		}
 
-		$xpath = new DomXPath($doc);
+		$xpath = new DOMXPath($doc);
 
-		//$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
-		$feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
-		if (!is_object($feeds)) {
-			return false;
+		$feedUrl = $xpath->evaluate('string(/html/head/link[@type="application/rss+xml" and @rel="alternate"]/@href)');
+
+		$feedUrl = $feedUrl ? self::ensureAbsoluteLinkFromHTMLDoc($feedUrl, $url, $xpath) : '';
+
+		return $feedUrl;
+	}
+
+	/**
+	 * Return an absolute URL in the context of a HTML document retrieved from the provided URL.
+	 *
+	 * Loosely based on RFC 1808
+	 *
+	 * @see https://tools.ietf.org/html/rfc1808
+	 *
+	 * @param string   $href  The potential relative href found in the HTML document
+	 * @param string   $base  The HTML document URL
+	 * @param DOMXPath $xpath The HTML document XPath
+	 * @return string
+	 */
+	private static function ensureAbsoluteLinkFromHTMLDoc(string $href, string $base, DOMXPath $xpath)
+	{
+		if (filter_var($href, FILTER_VALIDATE_URL)) {
+			return $href;
 		}
 
-		if ($feeds->length == 0) {
-			return false;
-		}
+		$base = $xpath->evaluate('string(/html/head/base/@href)') ?: $base;
 
-		$feed_url = "";
+		$baseParts = parse_url($base);
 
-		foreach ($feeds as $feed) {
-			$attr = [];
-			foreach ($feed->attributes as $attribute) {
-				$attr[$attribute->name] = trim($attribute->value);
+		// Naked domain case (scheme://basehost)
+		$path = $baseParts['path'] ?? '/';
+
+		// Remove the filename part of the path if it exists (/base/path/file)
+		$path = implode('/', array_slice(explode('/', $path), 0, -1));
+
+		$hrefParts = parse_url($href);
+
+		// Root path case (/path) including relative scheme case (//host/path)
+		if ($hrefParts['path'] && $hrefParts['path'][0] == '/') {
+			$path = $hrefParts['path'];
+		} else {
+			$path = $path . '/' . $hrefParts['path'];
+
+			// Resolve arbitrary relative path
+			// Lifted from https://www.php.net/manual/en/function.realpath.php#84012
+			$parts = array_filter(explode('/', $path), 'strlen');
+			$absolutes = array();
+			foreach ($parts as $part) {
+				if ('.' == $part) continue;
+				if ('..' == $part) {
+					array_pop($absolutes);
+				} else {
+					$absolutes[] = $part;
+				}
 			}
 
-			if (empty($feed_url) && !empty($attr['href'])) {
-				$feed_url = $attr["href"];
-			}
+			$path = '/' . implode('/', $absolutes);
 		}
 
-		return $feed_url;
+		// Relative scheme case (//host/path)
+		$baseParts['host'] = $hrefParts['host'] ?? $baseParts['host'];
+		$baseParts['path'] = $path;
+		unset($baseParts['query']);
+		unset($baseParts['fragment']);
+
+		return Network::unparseURL($baseParts);
 	}
 
 	/**
@@ -1826,7 +1863,7 @@ class Probe
 				return false;
 			}
 
-			$feed_url = self::getFeedLink($url);
+			$feed_url = self::getFeedLink($url, $feed);
 
 			if (!$feed_url) {
 				return false;
diff --git a/tests/src/Network/ProbeTest.php b/tests/src/Network/ProbeTest.php
new file mode 100644
index 0000000000..2dfc0e2ac8
--- /dev/null
+++ b/tests/src/Network/ProbeTest.php
@@ -0,0 +1,108 @@
+<?php
+
+namespace Friendica\Test\src\Network;
+
+use Friendica\Network\Probe;
+use PHPUnit\Framework\TestCase;
+
+class ProbeTest extends TestCase
+{
+	const TEMPLATENOBASE = '
+<!DOCTYPE html>
+<html lang="en-us">
+<head>
+    <title>Example Blog</title>
+    <link href="{{$link}}" rel="alternate" type="application/rss+xml" title="Example Blog" />
+	<link href="{{$link}}" rel="feed" type="application/rss+xml" title="Example Blog" />
+</head>
+<body>
+    <p>Hello World!</p>
+</body>
+</html>';
+
+	const TEMPLATEBASE = '
+<!DOCTYPE html>
+<html lang="en-us">
+<head>
+    <title>Example Blog</title>
+    <link href="{{$link}}" rel="alternate" type="application/rss+xml" title="Example Blog" />
+	<link href="{{$link}}" rel="feed" type="application/rss+xml" title="Example Blog" />
+    <base href="{{$url}}">
+</head>
+<body>
+    <p>Hello World!</p>
+</body>
+</html>';
+
+	const EXPECTED = [
+		'https://example.org/path/to/blog/index.php' => [
+			'index.xml'               => 'https://example.org/path/to/blog/index.xml',
+			'./index.xml'             => 'https://example.org/path/to/blog/index.xml',
+			'../index.xml'            => 'https://example.org/path/to/index.xml',
+			'/index.xml'              => 'https://example.org/index.xml',
+			'//example.com/index.xml' => 'https://example.com/index.xml',
+		],
+		'https://example.org/path/to/blog/' => [
+			'index.xml'               => 'https://example.org/path/to/blog/index.xml',
+			'./index.xml'             => 'https://example.org/path/to/blog/index.xml',
+			'../index.xml'            => 'https://example.org/path/to/index.xml',
+			'/index.xml'              => 'https://example.org/index.xml',
+			'//example.com/index.xml' => 'https://example.com/index.xml',
+		],
+		'https://example.org/blog/' => [
+			'index.xml'               => 'https://example.org/blog/index.xml',
+			'./index.xml'             => 'https://example.org/blog/index.xml',
+			'../index.xml'            => 'https://example.org/index.xml',
+			'/index.xml'              => 'https://example.org/index.xml',
+			'//example.com/index.xml' => 'https://example.com/index.xml',
+		],
+		'https://example.org' => [
+			'index.xml'               => 'https://example.org/index.xml',
+			'./index.xml'             => 'https://example.org/index.xml',
+			'../index.xml'            => 'https://example.org/index.xml',
+			'/index.xml'              => 'https://example.org/index.xml',
+			'//example.com/index.xml' => 'https://example.com/index.xml',
+		],
+	];
+
+	private function replaceMacros($template, $vars)
+	{
+		foreach ($vars as $var => $value) {
+			$template = str_replace('{{' . $var . '}}', $value, $template);
+		}
+
+		return $template;
+	}
+
+	/**
+	 * @small
+	 */
+	public function testGetFeedLinkNoBase()
+	{
+		foreach (self::EXPECTED as $url => $hrefs) {
+			foreach ($hrefs as $href => $expected) {
+				$body = $this->replaceMacros(self::TEMPLATENOBASE, ['$link' => $href]);
+
+				$feedLink = Probe::getFeedLink($url, $body);
+
+				$this->assertEquals($expected, $feedLink, 'base url = ' . $url . ' | href = ' . $href);
+			}
+		}
+	}
+
+	/**
+	 * @small
+	 */
+	public function testGetFeedLinkBase()
+	{
+		foreach (self::EXPECTED as $url => $hrefs) {
+			foreach ($hrefs as $href => $expected) {
+				$body = $this->replaceMacros(self::TEMPLATEBASE, ['$url' => $url, '$link' => $href]);
+
+				$feedLink = Probe::getFeedLink('http://example.com', $body);
+
+				$this->assertEquals($expected, $feedLink, 'base url = ' . $url . ' | href = ' . $href);
+			}
+		}
+	}
+}