CVE-2026-105055 WordPress WP Mailster plugin <= 1.9.0.0 - Broken Access Control vulnerability
Attackers can bypass access controls in the WP Mailster WordPress plugin to perform unauthorized actions.
- 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-2026-105055?
CVE-2026-105055 is a medium-severity missing authorization vulnerability in WP Mailster, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Missing Authorization vulnerability in WP Mailster WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through 1.9.0.0.
Weakness: CWE-862
Which versions are affected by CVE-2026-105055?
How do I fix CVE-2026-105055?
No fix has been published for CVE-2026-105055 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-2026-105055 being exploited?
There is no known exploitation of CVE-2026-105055 in the wild and no public exploit code.
Sources
Also known as GHSA-9hvg-5v96-5mqx.