diff --git a/README.md b/README.md
index d2c899dd..b87335df 100644
--- a/README.md
+++ b/README.md
@@ -196,6 +196,13 @@ $ node build/scripts/blockUser.js --userId=<userId> --blockedReason=<Announcemen
 
 -  For more options, run the above script with `--help` or see the file level comments.
 
+### Replace the media of an article
+- This command replaces all the variants of a media article's file on GCS with the variants of the new file.
+
+```
+$ node build/script/replaceMedia.js --articleId=<articleId> --url=<new-file-url>
+```
+
 ### Generating a spreadsheet of new article-categories for human review
 -  To retrieve a spreadsheet of article categories of interest after a specific timestamp, run:
 ```
diff --git a/src/graphql/__fixtures__/media-integration/replaced.jpg b/src/graphql/__fixtures__/media-integration/replaced.jpg
new file mode 100644
index 00000000..fb38835e
Binary files /dev/null and b/src/graphql/__fixtures__/media-integration/replaced.jpg differ
diff --git a/src/graphql/__tests__/media-integration.js b/src/graphql/__tests__/media-integration.js
index 44de2c59..25b9f122 100644
--- a/src/graphql/__tests__/media-integration.js
+++ b/src/graphql/__tests__/media-integration.js
@@ -8,6 +8,7 @@ import gql from 'util/GraphQL';
 import client from 'util/client';
 import delayForMs from 'util/delayForMs';
 import { getReplyRequestId } from 'graphql/mutations/CreateOrUpdateReplyRequest';
+import replaceMedia from 'scripts/replaceMedia';
 
 if (process.env.GCS_CREDENTIALS && process.env.GCS_BUCKET_NAME) {
   // File server serving test input file in __fixtures__/media-integration
@@ -163,4 +164,92 @@ if (process.env.GCS_CREDENTIALS && process.env.GCS_BUCKET_NAME) {
     },
     15000
   );
+
+  it(
+    'can replace media for article',
+    async () => {
+      // Simulates user login
+      const context = {
+        user: { id: 'foo', appId: 'WEBSITE' },
+      };
+
+      const createMediaArticleResult = await gql`
+        mutation($mediaUrl: String!) {
+          CreateMediaArticle(
+            mediaUrl: $mediaUrl
+            articleType: IMAGE
+            reference: { type: LINE }
+          ) {
+            id
+          }
+        }
+      `(
+        {
+          mediaUrl: `${serverUrl}/small.jpg`,
+        },
+        context
+      );
+
+      const articleId = createMediaArticleResult.data.CreateMediaArticle.id;
+
+      const articleBeforeReplace = await gql`
+        query($articleId: String!) {
+          GetArticle(id: $articleId) {
+            thumbnailUrl: attachmentUrl(variant: THUMBNAIL)
+          }
+        }
+      `({ articleId }, context);
+
+      // Wait until thumbnail is fully uploaded
+      {
+        let resp;
+        while (
+          !resp ||
+          resp.headers.get('Content-Type').startsWith('application/xml') // GCS returns XML for error
+        ) {
+          resp = await fetch(articleBeforeReplace.data.GetArticle.thumbnailUrl);
+          await delayForMs(1000); // Wait for upload to finish
+        }
+      }
+
+      await replaceMedia({ articleId, url: `${serverUrl}/replaced.jpg` });
+
+      const resp = await fetch(
+        articleBeforeReplace.data.GetArticle.thumbnailUrl
+      );
+      expect(resp.status).toBe(404);
+
+      const articleAfterReplace = await gql`
+        query($articleId: String!) {
+          GetArticle(id: $articleId) {
+            attachmentHash
+          }
+        }
+      `({ articleId }, context);
+
+      expect(
+        articleAfterReplace.data.GetArticle.attachmentHash
+      ).toMatchInlineSnapshot(
+        `"image.vDjh4g.__-AD6SDgAeTEcED___AA_Ej8y_Dg8EDgAOAA4P_8_8"`
+      );
+
+      // Cleanup
+      await client.delete({
+        index: 'articles',
+        type: 'doc',
+        id: articleId,
+      });
+
+      await client.delete({
+        index: 'replyrequests',
+        type: 'doc',
+        id: getReplyRequestId({
+          articleId,
+          userId: context.user.id,
+          appId: context.user.appId,
+        }),
+      });
+    },
+    15000
+  );
 }
diff --git a/src/graphql/mutations/CreateMediaArticle.js b/src/graphql/mutations/CreateMediaArticle.js
index 07f23c55..cf47778d 100644
--- a/src/graphql/mutations/CreateMediaArticle.js
+++ b/src/graphql/mutations/CreateMediaArticle.js
@@ -24,24 +24,14 @@ const VALID_ARTICLE_TYPE_TO_MEDIA_TYPE = {
 };
 
 /**
- * Creates a new article in ElasticSearch,
- * or return an article which attachment.hash is similar to mediaUrl
+ * Upload media of specified article type from the given mediaUrl
  *
  * @param {object} param
  * @param {string} param.mediaUrl
  * @param {ArticleTypeEnum} param.articleType
- * @param {ArticleReferenceInput} param.reference
- * @param {string} param.userId
- * @param {string} param.appId
- * @returns {Promise<string>} the new article's ID
+ * @returns {Promise<MediaEntry>}
  */
-async function createNewMediaArticle({
-  mediaUrl,
-  articleType,
-  reference: originalReference,
-  userId,
-  appId,
-}) {
+export async function uploadMedia({ mediaUrl, articleType }) {
   const mappedMediaType = VALID_ARTICLE_TYPE_TO_MEDIA_TYPE[articleType];
   const mediaEntry = await mediaManager.insert({
     url: mediaUrl,
@@ -93,6 +83,28 @@ async function createNewMediaArticle({
     },
   });
 
+  return mediaEntry;
+}
+
+/**
+ * Creates a new article in ElasticSearch,
+ * or return an article which attachment.hash is similar to mediaUrl
+ *
+ * @param {object} param
+ * @param {MediaEntry} param.mediaEntry
+ * @param {ArticleTypeEnum} param.articleType
+ * @param {ArticleReferenceInput} param.reference
+ * @param {string} param.userId
+ * @param {string} param.appId
+ * @returns {Promise<string>} the new article's ID
+ */
+async function createNewMediaArticle({
+  mediaEntry,
+  articleType,
+  reference: originalReference,
+  userId,
+  appId,
+}) {
   const attachmentHash = mediaEntry.id;
   const text = '';
   const now = new Date().toISOString();
@@ -168,9 +180,15 @@ export default {
     { user }
   ) {
     assertUser(user);
-    const articleId = await createNewMediaArticle({
+
+    const mediaEntry = await uploadMedia({
       mediaUrl,
       articleType,
+    });
+
+    const articleId = await createNewMediaArticle({
+      mediaEntry,
+      articleType,
       reference,
       userId: user.id,
       appId: user.appId,
diff --git a/src/scripts/blockUser.js b/src/scripts/blockUser.js
index 059653a8..0b2d981e 100644
--- a/src/scripts/blockUser.js
+++ b/src/scripts/blockUser.js
@@ -285,6 +285,7 @@ async function main({ userId, blockedReason } = {}) {
 
 export default main;
 
+/* istanbul ignore if */
 if (require.main === module) {
   const argv = yargs
     .options({
diff --git a/src/scripts/replaceMedia.js b/src/scripts/replaceMedia.js
new file mode 100644
index 00000000..1851ec31
--- /dev/null
+++ b/src/scripts/replaceMedia.js
@@ -0,0 +1,87 @@
+/**
+ * Given articleId and URL, replace the media with the content the URL points to.
+ */
+
+import 'dotenv/config';
+import yargs from 'yargs';
+import client from 'util/client';
+import mediaManager from 'util/mediaManager';
+import { uploadMedia } from 'graphql/mutations/CreateMediaArticle';
+
+/**
+ * @param {object} args
+ */
+async function replaceMedia({ articleId, url } = {}) {
+  const {
+    body: { _source: article },
+  } = await client.get({ index: 'articles', type: 'doc', id: articleId });
+
+  /* istanbul ignore if */
+  if (!article) throw new Error(`Article ${articleId} is not found`);
+
+  const oldMediaEntry = await mediaManager.get(article.attachmentHash);
+
+  /* istanbul ignore if */
+  if (!oldMediaEntry)
+    throw new Error(
+      `Article ${articleId}'s attachment hash "${
+        article.attachmentHash
+      }" has no corresponding media entry`
+    );
+
+  const newMediaEntry = await uploadMedia({
+    mediaUrl: url,
+    articleType: article.articleType,
+  });
+
+  console.info(
+    `Article ${articleId} attachment hash: ${oldMediaEntry.id} --> ${
+      newMediaEntry.id
+    }`
+  );
+  await client.update({
+    index: 'articles',
+    type: 'doc',
+    id: articleId,
+    body: {
+      doc: {
+        attachmentHash: newMediaEntry.id,
+      },
+    },
+  });
+
+  return Promise.all(
+    oldMediaEntry.variants.map(variant =>
+      oldMediaEntry
+        .getFile(variant)
+        .delete()
+        .then(() => {
+          console.info(`Old media entry variant=${variant} deleted`);
+        })
+    )
+  );
+}
+
+export default replaceMedia;
+
+/* istanbul ignore if */
+if (require.main === module) {
+  const argv = yargs
+    .options({
+      articleId: {
+        alias: 'a',
+        description: 'The article ID',
+        type: 'string',
+        demandOption: true,
+      },
+      url: {
+        alias: 'u',
+        description: 'The URL to the content to replace',
+        type: 'string',
+        demandOption: true,
+      },
+    })
+    .help('help').argv;
+
+  replaceMedia(argv).catch(console.error);
+}