diff --git a/packages/docusaurus-plugin-content-blog/src/feed.ts b/packages/docusaurus-plugin-content-blog/src/feed.ts
index f9053bec3417..fa546fbf0f18 100644
--- a/packages/docusaurus-plugin-content-blog/src/feed.ts
+++ b/packages/docusaurus-plugin-content-blog/src/feed.ts
@@ -9,7 +9,6 @@ import {Feed, type Author as FeedAuthor, type Item as FeedItem} from 'feed';
 import type {BlogPost} from './types';
 import {
   normalizeUrl,
-  posixPath,
   mapAsyncSequential,
   readOutputHTMLFile,
 } from '@docusaurus/utils';
@@ -128,10 +127,7 @@ async function createBlogFeedFile({
     }
   })();
   try {
-    await fs.outputFile(
-      posixPath(path.join(generatePath, feedPath)),
-      feedContent,
-    );
+    await fs.outputFile(path.join(generatePath, feedPath), feedContent);
   } catch (err) {
     throw new Error(`Generating ${feedType} feed failed: ${err}.`);
   }
diff --git a/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts b/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts
index 8ca46aeb8195..22aeed790cb9 100644
--- a/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts
+++ b/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts
@@ -181,7 +181,7 @@ describe('docsVersion', () => {
         DEFAULT_OPTIONS,
       ),
     ).rejects.toThrowErrorMatchingInlineSnapshot(
-      `"[docs]: there is no docs to version!"`,
+      `"[docs]: no docs found in <PROJECT_ROOT>/packages/docusaurus-plugin-content-docs/src/__tests__/__fixtures__/empty-site/docs."`,
     );
   });
 
diff --git a/packages/docusaurus-plugin-content-docs/src/cli.ts b/packages/docusaurus-plugin-content-docs/src/cli.ts
index 2aaceff79b2d..710a5c3d7c67 100644
--- a/packages/docusaurus-plugin-content-docs/src/cli.ts
+++ b/packages/docusaurus-plugin-content-docs/src/cli.ts
@@ -117,7 +117,7 @@ export async function cliDocsVersionCommand(
   const {path: docsPath, sidebarPath} = options;
 
   // Copy docs files.
-  const docsDir = path.join(siteDir, docsPath);
+  const docsDir = path.resolve(siteDir, docsPath);
 
   if (
     (await fs.pathExists(docsDir)) &&
@@ -127,7 +127,7 @@ export async function cliDocsVersionCommand(
     const newVersionDir = path.join(versionedDir, `version-${version}`);
     await fs.copy(docsDir, newVersionDir);
   } else {
-    throw new Error(`${pluginIdLogPrefix}: there is no docs to version!`);
+    throw new Error(`${pluginIdLogPrefix}: no docs found in ${docsDir}.`);
   }
 
   await createVersionedSidebarFile({
diff --git a/packages/docusaurus-plugin-content-docs/src/sidebars/generator.ts b/packages/docusaurus-plugin-content-docs/src/sidebars/generator.ts
index 928731fc4fc5..4642897f3df4 100644
--- a/packages/docusaurus-plugin-content-docs/src/sidebars/generator.ts
+++ b/packages/docusaurus-plugin-content-docs/src/sidebars/generator.ts
@@ -14,7 +14,7 @@ import type {
   SidebarItemCategoryLinkConfig,
 } from './types';
 import _ from 'lodash';
-import {addTrailingSlash, posixPath} from '@docusaurus/utils';
+import {addTrailingSlash} from '@docusaurus/utils';
 import logger from '@docusaurus/logger';
 import path from 'path';
 import {createDocsByIdIndex, toCategoryIndexMatcherParam} from '../docs';
@@ -157,7 +157,7 @@ Available doc IDs:
       folderName: string,
     ): WithPosition<NormalizedSidebarItemCategory> {
       const categoryMetadata =
-        categoriesMetadata[posixPath(path.join(autogenDir, fullPath))];
+        categoriesMetadata[path.posix.join(autogenDir, fullPath)];
       const allItems = Object.entries(dir).map(([key, content]) =>
         dirToItem(content, key, `${fullPath}/${key}`),
       );
diff --git a/packages/docusaurus-utils/src/dataFileUtils.ts b/packages/docusaurus-utils/src/dataFileUtils.ts
index 58fc8151165e..34ed9befeb83 100644
--- a/packages/docusaurus-utils/src/dataFileUtils.ts
+++ b/packages/docusaurus-utils/src/dataFileUtils.ts
@@ -37,7 +37,7 @@ export async function getDataFilePath({
     filePath,
   );
   if (contentPath) {
-    return path.join(contentPath, filePath);
+    return path.resolve(contentPath, filePath);
   }
   return undefined;
 }
diff --git a/packages/docusaurus/src/commands/serve.ts b/packages/docusaurus/src/commands/serve.ts
index 72f79bc06fbe..eed951fda525 100644
--- a/packages/docusaurus/src/commands/serve.ts
+++ b/packages/docusaurus/src/commands/serve.ts
@@ -18,9 +18,7 @@ export default async function serve(
   siteDir: string,
   cliOptions: ServeCLIOptions,
 ): Promise<void> {
-  let dir = path.isAbsolute(cliOptions.dir)
-    ? cliOptions.dir
-    : path.join(siteDir, cliOptions.dir);
+  let dir = path.resolve(siteDir, cliOptions.dir);
 
   if (cliOptions.build) {
     dir = await build(
diff --git a/packages/docusaurus/src/server/translations/translations.ts b/packages/docusaurus/src/server/translations/translations.ts
index 0cd6b0b37313..ba749f0aeff5 100644
--- a/packages/docusaurus/src/server/translations/translations.ts
+++ b/packages/docusaurus/src/server/translations/translations.ts
@@ -145,7 +145,7 @@ Maybe you should remove them? ${unknownKeys}`;
 
 // should we make this configurable?
 function getTranslationsDirPath(context: TranslationContext): string {
-  return path.resolve(path.join(context.siteDir, I18N_DIR_NAME));
+  return path.join(context.siteDir, I18N_DIR_NAME);
 }
 export function getTranslationsLocaleDirPath(
   context: TranslationContext,