diff --git a/doc/update/4.2-to-5.0.md b/doc/update/4.2-to-5.0.md
index 90f59e1fd1a4f4d550a726449c443eac348559c7..5bf8c36773465879a7c155b77460e482ec82df7f 100644
--- a/doc/update/4.2-to-5.0.md
+++ b/doc/update/4.2-to-5.0.md
@@ -1,5 +1,8 @@
 # From 4.2 to 5.0
 
+## Warning
+GitLab 5.0 is affected by critical security vulnerability CVE-2013-4490. Please update to GitLab 5.4 immediately.
+
 ## Important changes
 
 * We don't use `gitlab` user any more. Everything will be moved to `git` user
diff --git a/doc/update/5.0-to-5.1.md b/doc/update/5.0-to-5.1.md
index 45fc3436ebeb9ea376998b87cd41636e7160141c..bfbf926c48ee46792136ba40ffbbcae8a36196be 100644
--- a/doc/update/5.0-to-5.1.md
+++ b/doc/update/5.0-to-5.1.md
@@ -1,5 +1,8 @@
 # From 5.0 to 5.1
 
+## Warning
+GitLab 5.1 is affected by critical security vulnerability CVE-2013-4490. Please update to GitLab 5.4 immediately.
+
 ## Release notes:
 
 * `unicorn` replaced with `puma`
diff --git a/doc/update/5.1-to-5.2.md b/doc/update/5.1-to-5.2.md
index 27f992ecfe6831436ed4c48cb9620859f76d1b4c..e6c33903f8c36f20256cad28305a2bbcf2ec639c 100644
--- a/doc/update/5.1-to-5.2.md
+++ b/doc/update/5.1-to-5.2.md
@@ -1,5 +1,8 @@
 # From 5.1 to 5.2
 
+## Warning
+GitLab 5.2 is affected by critical security vulnerabilities CVE-2013-4490 and CVE-2013-4489. Please update to GitLab 5.4 immediately.
+
 ### 0. Backup
 
 It's useful to make a backup just in case things go south:
diff --git a/doc/update/5.1-to-6.0.md b/doc/update/5.1-to-6.0.md
index 6105d4b53bcd5695f3e5a649186f6e7cf770230e..d66ff16ffa8c8b0a7b39e0f200609c096760ed7f 100644
--- a/doc/update/5.1-to-6.0.md
+++ b/doc/update/5.1-to-6.0.md
@@ -1,5 +1,8 @@
 # From 5.1 to 6.0
 
+## Warning
+GitLab 6.0 is affected by critical security vulnerabilities CVE-2013-4490 and CVE-2013-4489. Please update to GitLab 6.2 or newer immediately.
+
 ### Deprecations
 
 #### Global projects
diff --git a/doc/update/5.2-to-5.3.md b/doc/update/5.2-to-5.3.md
index a8bb530902c37fa11c63bf8bbaaef1b2c42da6f4..0ae223e856b2ab9012d7475f6a353b4119060554 100644
--- a/doc/update/5.2-to-5.3.md
+++ b/doc/update/5.2-to-5.3.md
@@ -1,5 +1,8 @@
 # From 5.2 to 5.3
 
+## Warning
+GitLab 5.3 is affected by critical security vulnerabilities CVE-2013-4490 and CVE-2013-4489. Please update to GitLab 5.4 immediately.
+
 ### 0. Backup
 
 It's useful to make a backup just in case things go south:
diff --git a/doc/update/5.3-to-5.4.md b/doc/update/5.3-to-5.4.md
index 315bf03a6deb5fb0169377bd2e12a60764802ce0..c37cb3e45ce33e89535c9eba613a454d13ce454c 100644
--- a/doc/update/5.3-to-5.4.md
+++ b/doc/update/5.3-to-5.4.md
@@ -1,5 +1,8 @@
 # From 5.3 to 5.4
 
+## Notice
+Security vulnerabilities CVE-2013-4490 and CVE-2013-4489 have been patched in the latest version of GitLab 5.4.
+
 ### 0. Backup
 
 It's useful to make a backup just in case things go south:
diff --git a/doc/update/5.4-to-6.0.md b/doc/update/5.4-to-6.0.md
index 3072a1da716b3d47bab61e5edaae892d7c1a185a..83d55e24190eb07eef592c4dab56be9fa684a44d 100644
--- a/doc/update/5.4-to-6.0.md
+++ b/doc/update/5.4-to-6.0.md
@@ -1,5 +1,8 @@
 # From 5.4 to 6.0
 
+## Warning
+GitLab 6.0 is affected by critical security vulnerabilities CVE-2013-4490 and CVE-2013-4489. Please update to GitLab 6.2 or newer immediately.
+
 ### Deprecations
 
 #### Global projects
diff --git a/doc/update/6.0-to-6.1.md b/doc/update/6.0-to-6.1.md
index 67770bd93d63b7848f69438812808498800ef75a..81392379b0bec4b6836ab1a6484845b59651bbf8 100644
--- a/doc/update/6.0-to-6.1.md
+++ b/doc/update/6.0-to-6.1.md
@@ -1,5 +1,8 @@
 # From 6.0 to 6.1
 
+## Warning
+GitLab 6.1 is affected by critical security vulnerabilities CVE-2013-4490 and CVE-2013-4489. Please [update straight to 6.2](6.0-to-6.2.md).
+
 # In 6.1 we remove a lot of deprecated code.
 # You should update to 6.0 before installing 6.1 so all the necessary conversions are run.
 
diff --git a/doc/update/6.1-to-6.2.md b/doc/update/6.1-to-6.2.md
index 6f0514a8610593e8fa2226f8de23515fd80c7a53..0970f458f707ab1ab0681f17956d4d74af4e82d5 100644
--- a/doc/update/6.1-to-6.2.md
+++ b/doc/update/6.1-to-6.2.md
@@ -1,5 +1,8 @@
 # From 6.1 to 6.2
 
+## Notice
+Security vulnerabilities CVE-2013-4490 and CVE-2013-4489 have been patched in the latest version of GitLab 6.2.
+
 # You should update to 6.1 before installing 6.2 so all the necessary conversions are run.
 
 ### 0. Backup