spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/SpringPropertyAction.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.logging.logback;
 
+import ch.qos.logback.core.joran.action.ActionUtil;
 import ch.qos.logback.core.joran.action.BaseModelAction;
 import ch.qos.logback.core.joran.spi.SaxEventInterpretationContext;
 import ch.qos.logback.core.model.Model;
@@ -46,6 +47,10 @@ protected Model buildCurrentModel(SaxEventInterpretationContext interpretationCo
 		model.setSource(attributes.getValue(SOURCE_ATTRIBUTE));
 		model.setScope(attributes.getValue(SCOPE_ATTRIBUTE));
 		model.setDefaultValue(attributes.getValue(DEFAULT_VALUE_ATTRIBUTE));
+
+		if (ActionUtil.stringToScope(model.getScope()) == ActionUtil.Scope.CONTEXT) {
+			interpretationContext.getContext().putProperty(model.getName(), model.getSourceOrDefaultValue());
+		}
 		return model;
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/SpringPropertyModel.java

@@ -58,4 +58,11 @@ void setSource(String source) {
 		this.source = source;
 	}
 
+	String getSourceOrDefaultValue() {
+		if (this.source == null) {
+			return this.defaultValue;
+		}
+		return this.source;
+	}
+
 }