CVE-2026-84740 The Events Calendar 6.12.0 - 6.17.5 - Unauthenticated Arbitrary Shortcode Execution via 'view_data' Parameter
Unauthenticated attackers can execute arbitrary shortcodes in The Events Calendar plugin by manipulating the view_data parameter, potentially leading to code execution.
- 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-2026-84740?
CVE-2026-84740 is a medium-severity code injection vulnerability in Unknown The Events Calendar, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Events Calendar WordPress plugin before 6.17.5.1 does not validate or sanitise data submitted to an unauthenticated AJAX action before merging it into its rendering context, allowing unauthenticated users to execute arbitrary shortcodes registered on the site.
Weakness: CWE-74
Which versions are affected by CVE-2026-84740?
How do I fix CVE-2026-84740?
No fix has been published for CVE-2026-84740 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-84740 being exploited?
There is no known exploitation of CVE-2026-84740 in the wild and no public exploit code.
Sources
Also known as GHSA-4c37-j68q-cmxj.