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.
Published: 2026-09-12
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 13 Sep 2026 06:30:00 +0000

Type Values Removed Values Added
First Time appeared Stellarwp
Stellarwp the Events Calendar
Wordpress
Wordpress wordpress
Vendors & Products Stellarwp
Stellarwp the Events Calendar
Wordpress
Wordpress wordpress

Sat, 12 Sep 2026 07:45:00 +0000

Type Values Removed Values Added
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.
Title The Events Calendar <= 6.17.3 - Unauthenticated Code Injection to Remote Code Execution via Widget 'classes' Map Callable Invocation
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Subscriptions

Stellarwp The Events Calendar
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-09-14T16:10:33.540Z

Reserved: 2026-08-23T11:39:39.155Z

Link: CVE-2026-78159

cve-icon Vulnrichment

Updated: 2026-09-14T16:10:29.880Z

cve-icon NVD

Status : Deferred

Published: 2026-09-12T08:16:24.377

Modified: 2026-09-14T17:17:51.410

Link: CVE-2026-78159

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-14T16:45:05Z

Weaknesses
  • CWE-94

    Improper Control of Generation of Code ('Code Injection')