CVE-2025-68624 Missing authorization in Mail Assure
Authenticated users can impersonate other tenants' domains in outbound emails, bypassing sender validation and potentially enabling phishing attacks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-68624?
CVE-2025-68624 is a medium-severity missing authorization vulnerability in N-able Mail Assure, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
N-able Mail Assure through April 2026 contains a design-level authorization flaw that allows an authenticated SMTP user to send outbound email using MAIL FROM addresses belonging to other tenants. When connecting to the SMTP TCP port and performing SMTP AUTH with valid credentials, the server accepts arbitrary sender domains without enforcing any domain-to-account binding. As a result, an attacker from any tenant can impersonate other tenant domains, producing messages that pass SPF and DMARC validation. NOTE: N-able's position is that the behavior is intended functionality of its shared SMTP relay architecture and that the service does not represent that it enforces per-tenant sender-domain binding.
Weakness: CWE-290
Which versions are affected by CVE-2025-68624?
How do I fix CVE-2025-68624?
No fix has been published for CVE-2025-68624 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-68624 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-68624 exists.
Sources
Also known as GHSA-8wch-g3f4-9xpr.