diff --git a/xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-api/src/main/java/org/xwiki/security/authorization/cache/internal/DefaultSecurityCache.java b/xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-api/src/main/java/org/xwiki/security/authorization/cache/internal/DefaultSecurityCache.java
index eb00308..e57e10e 100644
--- a/xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-api/src/main/java/org/xwiki/security/authorization/cache/internal/DefaultSecurityCache.java
+++ b/xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-api/src/main/java/org/xwiki/security/authorization/cache/internal/DefaultSecurityCache.java
@@ -809,14 +809,19 @@ public void cacheEntryAdded(
         @Override
         public void cacheEntryRemoved(CacheEntryEvent<SecurityCacheEntry> event)
         {
-            if (event.getEntry().getValue().dispose()) {
-                if (logger.isDebugEnabled()) {
-                    logger.debug("Evicting entry [{}].", event.getEntry().getKey());
-                }
-            } else {
-                if (logger.isDebugEnabled()) {
-                    logger.debug("Removed entry [{}].", event.getEntry().getKey());
+            writeLock.lock();
+            try {
+                if (event.getEntry().getValue().dispose()) {
+                    if (logger.isDebugEnabled()) {
+                        logger.debug("Evicting entry [{}].", event.getEntry().getKey());
+                    }
+                } else {
+                    if (logger.isDebugEnabled()) {
+                        logger.debug("Removed entry [{}].", event.getEntry().getKey());
+                    }
                 }
+            } finally {
+                writeLock.unlock();
             }
         }