CVE-2026-84740: CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in The Events Calendar
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.
AI Analysis
Technical Summary
CVE-2026-84740 is an injection vulnerability (CWE-74) in The Events Calendar WordPress plugin prior to version 6.17.5.1. The plugin fails to validate or sanitize data submitted via an unauthenticated AJAX action before merging it into its rendering context. This allows unauthenticated attackers to execute arbitrary shortcodes registered on the WordPress site, which could lead to unauthorized content injection or manipulation.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to execute arbitrary shortcodes on the affected WordPress site. This may result in unauthorized content rendering or manipulation, potentially impacting the integrity and trustworthiness of the site content. The CVSS v3.1 base score is 6.5 (medium severity), indicating a moderate impact on confidentiality and integrity without affecting availability.
Mitigation Recommendations
A fix is available in The Events Calendar plugin version 6.17.5.1. Users should upgrade to version 6.17.5.1 or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-84740: CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in The Events Calendar
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.
CVSS v3.1
Score 6.5medium
Affected software
The Events Calendar
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84740 is an injection vulnerability (CWE-74) in The Events Calendar WordPress plugin prior to version 6.17.5.1. The plugin fails to validate or sanitize data submitted via an unauthenticated AJAX action before merging it into its rendering context. This allows unauthenticated attackers to execute arbitrary shortcodes registered on the WordPress site, which could lead to unauthorized content injection or manipulation.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to execute arbitrary shortcodes on the affected WordPress site. This may result in unauthorized content rendering or manipulation, potentially impacting the integrity and trustworthiness of the site content. The CVSS v3.1 base score is 6.5 (medium severity), indicating a moderate impact on confidentiality and integrity without affecting availability.
Mitigation Recommendations
A fix is available in The Events Calendar plugin version 6.17.5.1. Users should upgrade to version 6.17.5.1 or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-02T08:41:15.939Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abf8f55a43b0b3b89ac0a7c
Added to database: 10/02/2026, 11:02:45 UTC
Last enriched: 10/02/2026, 11:17:05 UTC
Last updated: 10/02/2026, 18:45:56 UTC
Views: 6
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