Add advisory to index

Author: tvdijen

security/index.md

@@ -72,6 +72,8 @@ contact us privately first in order to avoid any potential damage to those using
 
 ## List of Security Advisories
 
+* [**SSPSA 202512-01**](/security/202512-01): Signature verification bypass.
+
 * [**SSPSA 202501-01**](/security/202501-01): Signature verification bypass.
 
 * [**SSPSA 202412-01**](/security/202412-01): XXE in parsing SAML messages.