Add vpatch-CVE-2025-53693 rule

Author: crowdsec-automation

appsec-rules/crowdsecurity/vpatch-CVE-2025-53693.yaml

@@ -0,0 +1,34 @@
+## autogenerated on 2026-06-17 10:34:57
+name: crowdsecurity/vpatch-CVE-2025-53693
+description: 'Detects Sitecore XAML AjaxScriptManager cache poisoning via AddToCache reflection method.'
+rules:
+  - and:
+      - zones:
+          - URI
+        transform:
+          - lowercase
+        match:
+          type: contains
+          value: '/-/xaml/'
+      - zones:
+          - BODY_ARGS
+        variables:
+          - __parameters
+        transform:
+          - lowercase
+          - urldecode
+        match:
+          type: contains
+          value: 'addtocache'
+
+labels:
+  type: exploit
+  service: http
+  confidence: 3
+  spoofable: 0
+  behavior: 'http:exploit'
+  label: 'Sitecore - Cache Poisoning'
+  classification:
+    - cve.CVE-2025-53693
+    - attack.T1190
+    - cwe.CWE-20