CVE-2026-39493 WordPress Simply Schedule Appointments plugin <= 1.6.9.27 - SQL Injection vulnerability
Unauthenticated attackers can execute arbitrary SQL commands via the Simply Schedule Appointments plugin, potentially accessing or modifying database content.
- 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-2026-39493?
CVE-2026-39493 is a critical SQL injection vulnerability in NSquared Simply Schedule Appointments, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unauthenticated SQL Injection in Simply Schedule Appointments <= 1.6.9.27 versions.
Weakness: CWE-89
Which versions are affected by CVE-2026-39493?
How do I fix CVE-2026-39493?
No fix has been published for CVE-2026-39493 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-39493 being exploited?
There is no known exploitation of CVE-2026-39493 in the wild and no public exploit code.
Sources
Also known as GHSA-87gp-c4mf-v6pp.