WS-2023-0061

Folder in modoboa-webmail mailbox is vulnerable to Reflected Cross-Site Scripting. An attacker can use the vulnerability to construct a request that, if issued by another application user, will cause JavaScript code supplied by the attacker to execute within the user's browser in the context of...

Remediation and Hardening Strategies for Microsoft 365 to Defend Against UNC2452

UPDATE Oct. 28, 2021: Mandiant has recently observed targeted threat actors using EWS impersonation via the ApplicationImpersonation role to maintain persistent access to mailboxes in victim environments. Once the threat actor has access to this role, its abuse is hard to detect and provides the...