diff --git a/CHANGELOG.md b/CHANGELOG.md
index d4ee7cabc..7921d945d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@
 
 ### v1.14.5
 
+**v1.14.5.3** *(2018-12-07)* - [[Userscript](https://raw.githubusercontent.com/ccd0/4chan-x/1.14.5.3/builds/4chan-X-noupdate.user.js)] [[Chrome extension](https://raw.githubusercontent.com/ccd0/4chan-x/1.14.5.3/builds/4chan-X-noupdate.crx)]
+- Fix bugs in cross-site data access.
+
 **v1.14.5.2** *(2018-12-07)* - [[Userscript](https://raw.githubusercontent.com/ccd0/4chan-x/1.14.5.2/builds/4chan-X-noupdate.user.js)] [[Chrome extension](https://raw.githubusercontent.com/ccd0/4chan-x/1.14.5.2/builds/4chan-X-noupdate.crx)]
 - All Thread Watcher functionality is now supported on and across Tinyboard/vichan sites, including auto-updating, the unread count, and lighting up upon replies, with the exception that threads from sites without JSON APIs will not be updated when the thread watcher is refreshed.
 - The `Unread Count`, `Unread Line`, `Scroll to Last Read Post`, and `Desktop Notifications` are now supported on Tinyboard/vichan sites.
diff --git a/builds/4chan-X-beta.crx b/builds/4chan-X-beta.crx
index 184e8f4e9..9ef27656e 100644
Binary files a/builds/4chan-X-beta.crx and b/builds/4chan-X-beta.crx differ
diff --git a/builds/4chan-X-beta.meta.js b/builds/4chan-X-beta.meta.js
index d01249435..05cffd8f4 100644
--- a/builds/4chan-X-beta.meta.js
+++ b/builds/4chan-X-beta.meta.js
@@ -1,6 +1,6 @@
 // ==UserScript==
 // @name         4chan X beta
-// @version      1.14.5.2
+// @version      1.14.5.3
 // @minGMVer     1.14
 // @minFFVer     26
 // @namespace    4chan-X
diff --git a/builds/4chan-X-beta.user.js b/builds/4chan-X-beta.user.js
index 6a27f2b73..0adb1dbd7 100644
--- a/builds/4chan-X-beta.user.js
+++ b/builds/4chan-X-beta.user.js
@@ -1,6 +1,6 @@
 // ==UserScript==
 // @name         4chan X beta
-// @version      1.14.5.2
+// @version      1.14.5.3
 // @minGMVer     1.14
 // @minFFVer     26
 // @namespace    4chan-X
@@ -198,7 +198,7 @@ docSet = function() {
 };
 
 g = {
-  VERSION:   '1.14.5.2',
+  VERSION:   '1.14.5.3',
   NAMESPACE: '4chan X.',
   boards:    {}
 };
@@ -5843,6 +5843,9 @@ DataBoard = (function() {
       var boardID, postID, siteID, threadID;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID;
       siteID || (siteID = Site.hostname);
+      if (!this.data[siteID]) {
+        return;
+      }
       return this.save((function(_this) {
         return function() {
           var ref;
@@ -5875,6 +5878,9 @@ DataBoard = (function() {
     DataBoard.prototype.deleteIfEmpty = function(arg) {
       var boardID, siteID, threadID;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID;
+      if (!this.data[siteID]) {
+        return;
+      }
       if (threadID) {
         if (!Object.keys(this.data[siteID].boards[boardID][threadID]).length) {
           delete this.data[siteID].boards[boardID][threadID];
@@ -5897,13 +5903,16 @@ DataBoard = (function() {
     };
 
     DataBoard.prototype.setUnsafe = function(arg) {
-      var base, base1, base2, boardID, postID, siteID, threadID, val;
+      var base, base1, base2, base3, boardID, postID, siteID, threadID, val;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID, val = arg.val;
       siteID || (siteID = Site.hostname);
+      (base = this.data)[siteID] || (base[siteID] = {
+        boards: {}
+      });
       if (postID !== void 0) {
-        return ((base = ((base1 = this.data[siteID].boards)[boardID] || (base1[boardID] = {})))[threadID] || (base[threadID] = {}))[postID] = val;
+        return ((base1 = ((base2 = this.data[siteID].boards)[boardID] || (base2[boardID] = {})))[threadID] || (base1[threadID] = {}))[postID] = val;
       } else if (threadID !== void 0) {
-        return ((base2 = this.data[siteID].boards)[boardID] || (base2[boardID] = {}))[threadID] = val;
+        return ((base3 = this.data[siteID].boards)[boardID] || (base3[boardID] = {}))[threadID] = val;
       } else {
         return this.data[siteID].boards[boardID] = val;
       }
@@ -5948,10 +5957,10 @@ DataBoard = (function() {
     };
 
     DataBoard.prototype.get = function(arg) {
-      var ID, board, boardID, defaultValue, i, len, postID, siteID, thread, threadID, val;
+      var ID, board, boardID, defaultValue, i, len, postID, ref, siteID, thread, threadID, val;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID, defaultValue = arg.defaultValue;
       siteID || (siteID = Site.hostname);
-      if (board = this.data[siteID].boards[boardID]) {
+      if (board = (ref = this.data[siteID]) != null ? ref.boards[boardID] : void 0) {
         if (threadID == null) {
           if (postID != null) {
             for (thread = i = 0, len = board.length; i < len; thread = ++i) {
diff --git a/builds/4chan-X-noupdate.crx b/builds/4chan-X-noupdate.crx
index afab139e1..8c17e5cd5 100644
Binary files a/builds/4chan-X-noupdate.crx and b/builds/4chan-X-noupdate.crx differ
diff --git a/builds/4chan-X-noupdate.user.js b/builds/4chan-X-noupdate.user.js
index 894bfa2be..e8d49dbdd 100644
--- a/builds/4chan-X-noupdate.user.js
+++ b/builds/4chan-X-noupdate.user.js
@@ -1,6 +1,6 @@
 // ==UserScript==
 // @name         4chan X
-// @version      1.14.5.2
+// @version      1.14.5.3
 // @minGMVer     1.14
 // @minFFVer     26
 // @namespace    4chan-X
@@ -198,7 +198,7 @@ docSet = function() {
 };
 
 g = {
-  VERSION:   '1.14.5.2',
+  VERSION:   '1.14.5.3',
   NAMESPACE: '4chan X.',
   boards:    {}
 };
@@ -5843,6 +5843,9 @@ DataBoard = (function() {
       var boardID, postID, siteID, threadID;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID;
       siteID || (siteID = Site.hostname);
+      if (!this.data[siteID]) {
+        return;
+      }
       return this.save((function(_this) {
         return function() {
           var ref;
@@ -5875,6 +5878,9 @@ DataBoard = (function() {
     DataBoard.prototype.deleteIfEmpty = function(arg) {
       var boardID, siteID, threadID;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID;
+      if (!this.data[siteID]) {
+        return;
+      }
       if (threadID) {
         if (!Object.keys(this.data[siteID].boards[boardID][threadID]).length) {
           delete this.data[siteID].boards[boardID][threadID];
@@ -5897,13 +5903,16 @@ DataBoard = (function() {
     };
 
     DataBoard.prototype.setUnsafe = function(arg) {
-      var base, base1, base2, boardID, postID, siteID, threadID, val;
+      var base, base1, base2, base3, boardID, postID, siteID, threadID, val;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID, val = arg.val;
       siteID || (siteID = Site.hostname);
+      (base = this.data)[siteID] || (base[siteID] = {
+        boards: {}
+      });
       if (postID !== void 0) {
-        return ((base = ((base1 = this.data[siteID].boards)[boardID] || (base1[boardID] = {})))[threadID] || (base[threadID] = {}))[postID] = val;
+        return ((base1 = ((base2 = this.data[siteID].boards)[boardID] || (base2[boardID] = {})))[threadID] || (base1[threadID] = {}))[postID] = val;
       } else if (threadID !== void 0) {
-        return ((base2 = this.data[siteID].boards)[boardID] || (base2[boardID] = {}))[threadID] = val;
+        return ((base3 = this.data[siteID].boards)[boardID] || (base3[boardID] = {}))[threadID] = val;
       } else {
         return this.data[siteID].boards[boardID] = val;
       }
@@ -5948,10 +5957,10 @@ DataBoard = (function() {
     };
 
     DataBoard.prototype.get = function(arg) {
-      var ID, board, boardID, defaultValue, i, len, postID, siteID, thread, threadID, val;
+      var ID, board, boardID, defaultValue, i, len, postID, ref, siteID, thread, threadID, val;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID, defaultValue = arg.defaultValue;
       siteID || (siteID = Site.hostname);
-      if (board = this.data[siteID].boards[boardID]) {
+      if (board = (ref = this.data[siteID]) != null ? ref.boards[boardID] : void 0) {
         if (threadID == null) {
           if (postID != null) {
             for (thread = i = 0, len = board.length; i < len; thread = ++i) {
diff --git a/builds/4chan-X.crx b/builds/4chan-X.crx
index 0a88435eb..084bf1a76 100644
Binary files a/builds/4chan-X.crx and b/builds/4chan-X.crx differ
diff --git a/builds/4chan-X.meta.js b/builds/4chan-X.meta.js
index 90d386b8b..6c419e40d 100644
--- a/builds/4chan-X.meta.js
+++ b/builds/4chan-X.meta.js
@@ -1,6 +1,6 @@
 // ==UserScript==
 // @name         4chan X
-// @version      1.14.5.2
+// @version      1.14.5.3
 // @minGMVer     1.14
 // @minFFVer     26
 // @namespace    4chan-X
diff --git a/builds/4chan-X.user.js b/builds/4chan-X.user.js
index 1c1f66ee3..942521ebb 100644
--- a/builds/4chan-X.user.js
+++ b/builds/4chan-X.user.js
@@ -1,6 +1,6 @@
 // ==UserScript==
 // @name         4chan X
-// @version      1.14.5.2
+// @version      1.14.5.3
 // @minGMVer     1.14
 // @minFFVer     26
 // @namespace    4chan-X
@@ -198,7 +198,7 @@ docSet = function() {
 };
 
 g = {
-  VERSION:   '1.14.5.2',
+  VERSION:   '1.14.5.3',
   NAMESPACE: '4chan X.',
   boards:    {}
 };
@@ -5843,6 +5843,9 @@ DataBoard = (function() {
       var boardID, postID, siteID, threadID;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID;
       siteID || (siteID = Site.hostname);
+      if (!this.data[siteID]) {
+        return;
+      }
       return this.save((function(_this) {
         return function() {
           var ref;
@@ -5875,6 +5878,9 @@ DataBoard = (function() {
     DataBoard.prototype.deleteIfEmpty = function(arg) {
       var boardID, siteID, threadID;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID;
+      if (!this.data[siteID]) {
+        return;
+      }
       if (threadID) {
         if (!Object.keys(this.data[siteID].boards[boardID][threadID]).length) {
           delete this.data[siteID].boards[boardID][threadID];
@@ -5897,13 +5903,16 @@ DataBoard = (function() {
     };
 
     DataBoard.prototype.setUnsafe = function(arg) {
-      var base, base1, base2, boardID, postID, siteID, threadID, val;
+      var base, base1, base2, base3, boardID, postID, siteID, threadID, val;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID, val = arg.val;
       siteID || (siteID = Site.hostname);
+      (base = this.data)[siteID] || (base[siteID] = {
+        boards: {}
+      });
       if (postID !== void 0) {
-        return ((base = ((base1 = this.data[siteID].boards)[boardID] || (base1[boardID] = {})))[threadID] || (base[threadID] = {}))[postID] = val;
+        return ((base1 = ((base2 = this.data[siteID].boards)[boardID] || (base2[boardID] = {})))[threadID] || (base1[threadID] = {}))[postID] = val;
       } else if (threadID !== void 0) {
-        return ((base2 = this.data[siteID].boards)[boardID] || (base2[boardID] = {}))[threadID] = val;
+        return ((base3 = this.data[siteID].boards)[boardID] || (base3[boardID] = {}))[threadID] = val;
       } else {
         return this.data[siteID].boards[boardID] = val;
       }
@@ -5948,10 +5957,10 @@ DataBoard = (function() {
     };
 
     DataBoard.prototype.get = function(arg) {
-      var ID, board, boardID, defaultValue, i, len, postID, siteID, thread, threadID, val;
+      var ID, board, boardID, defaultValue, i, len, postID, ref, siteID, thread, threadID, val;
       siteID = arg.siteID, boardID = arg.boardID, threadID = arg.threadID, postID = arg.postID, defaultValue = arg.defaultValue;
       siteID || (siteID = Site.hostname);
-      if (board = this.data[siteID].boards[boardID]) {
+      if (board = (ref = this.data[siteID]) != null ? ref.boards[boardID] : void 0) {
         if (threadID == null) {
           if (postID != null) {
             for (thread = i = 0, len = board.length; i < len; thread = ++i) {
diff --git a/builds/4chan-X.zip b/builds/4chan-X.zip
index 7744a14e3..24fe0a7eb 100644
Binary files a/builds/4chan-X.zip and b/builds/4chan-X.zip differ
diff --git a/builds/updates-beta.json b/builds/updates-beta.json
index 247efc452..ca71b9829 100644
--- a/builds/updates-beta.json
+++ b/builds/updates-beta.json
@@ -3,7 +3,7 @@
     "4chan-x@4chan-x.net": {
       "updates": [
         {
-          "version": "1.14.5.2",
+          "version": "1.14.5.3",
           "update_link": "https://www.4chan-x.net/builds/4chan-X-beta.crx"
         }
       ]
diff --git a/builds/updates-beta.xml b/builds/updates-beta.xml
index 30e3a76a1..8f0f88358 100644
--- a/builds/updates-beta.xml
+++ b/builds/updates-beta.xml
@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <gupdate xmlns='http://www.google.com/update2/response' protocol='2.0'>
   <app appid='lacclbnghgdicfifcamcmcnilckjamag'>
-    <updatecheck codebase='https://www.4chan-x.net/builds/4chan-X-beta.crx' version='1.14.5.2' />
+    <updatecheck codebase='https://www.4chan-x.net/builds/4chan-X-beta.crx' version='1.14.5.3' />
   </app>
 </gupdate>
 
diff --git a/builds/updates.json b/builds/updates.json
index e36670270..f17125d3f 100644
--- a/builds/updates.json
+++ b/builds/updates.json
@@ -3,7 +3,7 @@
     "4chan-x@4chan-x.net": {
       "updates": [
         {
-          "version": "1.14.5.2",
+          "version": "1.14.5.3",
           "update_link": "https://www.4chan-x.net/builds/4chan-X.crx"
         }
       ]
diff --git a/builds/updates.xml b/builds/updates.xml
index acae2f8a0..ba1264495 100644
--- a/builds/updates.xml
+++ b/builds/updates.xml
@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <gupdate xmlns='http://www.google.com/update2/response' protocol='2.0'>
   <app appid='lacclbnghgdicfifcamcmcnilckjamag'>
-    <updatecheck codebase='https://www.4chan-x.net/builds/4chan-X.crx' version='1.14.5.2' />
+    <updatecheck codebase='https://www.4chan-x.net/builds/4chan-X.crx' version='1.14.5.3' />
   </app>
 </gupdate>
 
diff --git a/version.json b/version.json
index cf4d35ba7..d949e0ad0 100644
--- a/version.json
+++ b/version.json
@@ -1,4 +1,4 @@
 {
-  "version": "1.14.5.2",
-  "date": "2018-12-07T05:18:16.194Z"
+  "version": "1.14.5.3",
+  "date": "2018-12-07T07:37:49.493Z"
 }
\ No newline at end of file