The Events Calendar <= 6.17.3 - Unauthenticated Code Injection to Remote Code Execution via Widget 'classes' Map Callable Invocation
| CVE | CVE-2026-78159 |
|---|---|
| CVSS | 9.8 (Critical) |
| Publicly Published | September 11, 2026 |
| Last Updated | September 16, 2026 |
| Researchers |
Chloe Chamberland
- Wordfence
Wordfence Argus - Wordfence |
Description
The "The Events Calendar" plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 6.17.3 via the parse_array function. This is due to insufficient validation of the widget 'classes' map, allowing a plain-array payload to bypass the is_safe_widget_instance() object check and reach the callable-invocation sink in Element_Classes::parse_array(). This makes it possible for unauthenticated attackers to execute code on the server. Exploitation requires that the targeted site has comments enabled on tribe_events posts and that at least one comment containing a crafted wp:legacy-widget block has been submitted, as the attack chain is triggered when do_blocks() processes the single-event HTML including the comment area.
Wordfence blocked 6,170 attacks targeting this vulnerability in the past 24 hours.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for The Events Calendar
| Software Type | Plugin |
|---|---|
| Software Slug | the-events-calendar (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 6.17.3.1, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in The Events Calendar
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