CVE-2026-6854 My Calendar <= 3.7.8 - Unauthenticated SQL Injection via 'mc_auth' and 'mc_host' Parameters
Unauthenticated attackers can exploit SQL injection in the My Calendar plugin to extract sensitive database information.
- 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-2026-6854?
CVE-2026-6854 is a high-severity SQL injection vulnerability in joedolson My Calendar – Accessible Event Manager, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'mc_auth' parameter in all versions up to, and including, 3.7.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Weakness: CWE-89
Which versions are affected by CVE-2026-6854?
How do I fix CVE-2026-6854?
No fix has been published for CVE-2026-6854 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-2026-6854 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6854 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-r6mh-qhp6-q734.