CVE-2026-6235 Sendmachine for WordPress <= 1.0.20 - Unauthenticated SMTP Hijack to Privilege Escalation via manage_admin_requests
Unauthenticated attackers can overwrite SMTP settings to intercept outbound emails, including password resets, leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6235?
CVE-2026-6235 is a critical missing authorization vulnerability in Sendmachine for WordPress, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Sendmachine for WordPress plugin for WordPress is vulnerable to authorization bypass via the 'manage_admin_requests' function in all versions up to, and including, 1.0.20. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the plugin's SMTP configuration, which can be leveraged to intercept all outbound emails from the site (including password reset emails).
Weakness: CWE-862
Which versions are affected by CVE-2026-6235?
How do I fix CVE-2026-6235?
No fix has been published for CVE-2026-6235 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-2026-6235 being exploited?
There is no known exploitation of CVE-2026-6235 in the wild and no public exploit code.
Sources
Also known as GHSA-4x86-c4g3-px96.