CVE-2026-81278 WordPress Post SMTP plugin 4.0.0-beta.1 - Settings Change vulnerability
An attacker can modify Post SMTP plugin settings without proper authorization due to missing access control checks.
- 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-2026-81278?
CVE-2026-81278 is a medium-severity missing authorization vulnerability in WPExperts Post SMTP, published on 31 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Missing Authorization vulnerability in WPExperts Post SMTP allows Exploiting Incorrectly Configured Access Control Security Levels.
This issue affects Post SMTP: from 4.0.0 through beta.1.
Weakness: CWE-862
Which versions are affected by CVE-2026-81278?
How do I fix CVE-2026-81278?
No fix has been published for CVE-2026-81278 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-2026-81278 being exploited?
There is no known exploitation of CVE-2026-81278 in the wild and no public exploit code.
Sources
Also known as GHSA-jq3g-93gg-57x6.