The Events Calendar WordPress plugin before 6.17.5.1 does not validate or sanitise data submitted to an unauthenticated AJAX action before merging… (CVE-2026-84740)
The Events Calendar WordPress plugin versions before 6.17.5.1 contain a vulnerability where unauthenticated AJAX requests can submit data that is not properly validated or sanitized before being merged into the rendering context. This flaw allows unauthenticated users to execute arbitrary shortcodes registered on the site, potentially leading to limited confidentiality and integrity impacts.
AI Analysis
Technical Summary
The Events Calendar WordPress plugin prior to version 6.17.5.1 fails to validate or sanitize data submitted to an unauthenticated AJAX action before merging it into its rendering context. This improper handling enables unauthenticated attackers to execute arbitrary shortcodes registered on the site. The vulnerability is identified as CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).
Potential Impact
An unauthenticated attacker can exploit this vulnerability to execute arbitrary shortcodes, which may lead to limited confidentiality and integrity impacts on the affected site. There is no indication of availability impact. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in version 6.17.5.1 of The Events Calendar plugin. Users should upgrade to version 6.17.5.1 or later to remediate this vulnerability. No additional mitigation guidance is provided or required.
The Events Calendar WordPress plugin before 6.17.5.1 does not validate or sanitise data submitted to an unauthenticated AJAX action before merging… (CVE-2026-84740)
Description
The Events Calendar WordPress plugin versions before 6.17.5.1 contain a vulnerability where unauthenticated AJAX requests can submit data that is not properly validated or sanitized before being merged into the rendering context. This flaw allows unauthenticated users to execute arbitrary shortcodes registered on the site, potentially leading to limited confidentiality and integrity impacts.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Events Calendar WordPress plugin prior to version 6.17.5.1 fails to validate or sanitize data submitted to an unauthenticated AJAX action before merging it into its rendering context. This improper handling enables unauthenticated attackers to execute arbitrary shortcodes registered on the site. The vulnerability is identified as CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).
Potential Impact
An unauthenticated attacker can exploit this vulnerability to execute arbitrary shortcodes, which may lead to limited confidentiality and integrity impacts on the affected site. There is no indication of availability impact. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in version 6.17.5.1 of The Events Calendar plugin. Users should upgrade to version 6.17.5.1 or later to remediate this vulnerability. No additional mitigation guidance is provided or required.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-4c37-j68q-cmxj
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-84740"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abfeebca43b0b3b89e56604
Added to database: 10/02/2026, 17:49:48 UTC
Last enriched: 10/02/2026, 18:22:43 UTC
Last updated: 10/02/2026, 18:45:56 UTC
Views: 2
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