diff --git a/changelog.html b/changelog.html
index 279a7b458b..972b7a86fe 100644
--- a/changelog.html
+++ b/changelog.html
@@ -84,6 +84,9 @@ Upcoming changes</a>
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-17302">issue 17302</a>)
   <li class=rfe>
     Clearer display of log messages: chronological order, and coloration of repeated vs. fresh metadata (date, log level, log source).
+  <li class=bug>
+    Ensuring <code>/log/all</code> shows only <code>INFO</code> and above messages, even if custom loggers display <code>FINE</code> or below.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-18959">issue 18959</a>)
   <li class=bug>
     Fixed a regression that broke some plugins' form validation
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-18776">issue 18776</a>)
diff --git a/core/src/main/java/hudson/WebAppMain.java b/core/src/main/java/hudson/WebAppMain.java
index 8475fe221c..f6cf979bf8 100644
--- a/core/src/main/java/hudson/WebAppMain.java
+++ b/core/src/main/java/hudson/WebAppMain.java
@@ -59,6 +59,7 @@ import java.util.Locale;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.security.Security;
+import java.util.logging.LogRecord;
 
 /**
  * Entry point when Hudson is used as a webapp.
@@ -66,7 +67,13 @@ import java.security.Security;
  * @author Kohsuke Kawaguchi
  */
 public final class WebAppMain implements ServletContextListener {
-    private final RingBufferLogHandler handler = new RingBufferLogHandler();
+    private final RingBufferLogHandler handler = new RingBufferLogHandler() {
+        @Override public synchronized void publish(LogRecord record) {
+            if (record.getLevel().intValue() >= Level.INFO.intValue()) {
+                super.publish(record);
+            }
+        }
+    };
     private static final String APP = "app";
     private boolean terminated;
     private Thread initThread;