diff --git a/packages/strapi-utils/lib/__tests__/string-formatting.test.js b/packages/strapi-utils/lib/__tests__/string-formatting.test.js
index fc7c3c0159..e90e462a5a 100644
--- a/packages/strapi-utils/lib/__tests__/string-formatting.test.js
+++ b/packages/strapi-utils/lib/__tests__/string-formatting.test.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const { escapeQuery, stringIncludes, stringEquals } = require('../string-formatting');
+const { escapeQuery, stringIncludes, stringEquals, getCommonBeginning, getCommonPath } = require('../string-formatting');
 
 describe('string-formatting', () => {
   describe('Escape Query', () => {
@@ -64,4 +64,32 @@ describe('string-formatting', () => {
       expect(result).toBe(expectedResult);
     });
   });
+
+  describe('getCommonBeginning', () => {
+    const tests = [
+      [['abcd', 'abc', 'ab'], 'ab'],
+      [['abcd', 'abc'], 'abc'],
+      [['ab/cd', 'ab/c'], 'ab/c'],
+      [['abc', 'abc'], 'abc'],
+    ];
+    test.each(tests)('%p has common beginning: %p', (a, expectedResult) => {
+      const result = getCommonBeginning(...a);
+      expect(result).toBe(expectedResult);
+    });
+  });
+
+  describe('getCommonPath', () => {
+    const tests = [
+      [['abc', 'ab'], ''],
+      [['http://ab.com/cd', 'http://ab.com/c'], 'http://ab.com'],
+      [['http://ab.com/admin', 'http://ab.com/api'], 'http://ab.com'],
+      [['http://ab.com/admin', 'http://ab.com/admin/'], 'http://ab.com/admin'],
+      [['http://ab.com/admin', 'http://ab.com/admin'], 'http://ab.com/admin'],
+    ];
+    test.each(tests)('%p has common path: %p', (a, expectedResult) => {
+      const result = getCommonPath(...a);
+      expect(result).toBe(expectedResult);
+    });
+  });
+
 });
diff --git a/packages/strapi-utils/lib/config.js b/packages/strapi-utils/lib/config.js
index b36e746706..0e1f2ae1d5 100644
--- a/packages/strapi-utils/lib/config.js
+++ b/packages/strapi-utils/lib/config.js
@@ -1,7 +1,7 @@
 'use strict';
 
 const _ = require('lodash');
-const { getCommonBeginning } = require('./string-formatting');
+const { getCommonPath } = require('./string-formatting');
 
 const getConfigUrls = (serverConfig, forAdminBuild = false) => {
   // Defines serverUrl value
@@ -46,7 +46,7 @@ const getConfigUrls = (serverConfig, forAdminBuild = false) => {
     new URL(adminUrl).origin === new URL(serverUrl).origin &&
     !forAdminBuild
   ) {
-    adminPath = adminUrl.replace(getCommonBeginning(serverUrl, adminUrl), '');
+    adminPath = adminUrl.replace(getCommonPath(serverUrl, adminUrl), '');
     adminPath = `/${_.trim(adminPath, '/')}`;
   } else if (adminUrl.startsWith('http')) {
     adminPath = new URL(adminUrl).pathname;
diff --git a/packages/strapi-utils/lib/string-formatting.js b/packages/strapi-utils/lib/string-formatting.js
index 1ee95f2874..250aaf4b47 100644
--- a/packages/strapi-utils/lib/string-formatting.js
+++ b/packages/strapi-utils/lib/string-formatting.js
@@ -1,23 +1,21 @@
 'use strict';
-
+const _ = require('lodash');
 const slugify = require('@sindresorhus/slugify');
 
 const nameToSlug = (name, options = { separator: '-' }) => slugify(name, options);
 
 const nameToCollectionName = name => slugify(name, { separator: '_' });
 
-const getCommonBeginning = (str1 = '', str2 = '') => {
-  let common = '';
-  let index = 0;
-  while (index < str1.length && index < str2.length) {
-    if (str1[index] === str2[index]) {
-      common += str1[index];
-      index += 1;
-    } else {
-      break;
-    }
-  }
-  return common;
+const getCommonBeginning = (...strings) => _.takeWhile(
+  strings[0],
+  (char, index) => strings.every(string => string[index] === char)
+).join('');
+
+const getCommonPath = (...paths) => {
+  const [segments, ...otherSegments] = paths.map(it => _.split(it, '/'));
+  return _.join(
+    _.takeWhile(segments, (str, index) => otherSegments.every(it => it[index] === str))
+    , '/');
 };
 
 const escapeQuery = (query, charsToEscape, escapeChar = '\\') => {
@@ -39,6 +37,7 @@ module.exports = {
   nameToSlug,
   nameToCollectionName,
   getCommonBeginning,
+  getCommonPath,
   escapeQuery,
   stringIncludes,
   stringEquals,