Medium severity · published Oct 2, 2026
CVE-2026-84740
The Events Calendar 6.12.0 - 6.17.5 - Unauthenticated Arbitrary Shortcode Execution via 'view_data' Parameter
6.5
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TE
The Events Calendar ·
6.12.0 before 6.17.5.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84740
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84740
exploit
https://wpscan.com/vulnerability/3381a51e-beaa-4420-a33b-6a68612a2e8a/
More from The Events Calendar
9.1
CVE-2024-4180
The Events Calendar < 6.4.0.1 - Reflected XSS
7.5
CVE-2023-6203
The Events Calendar < 6.2.8.1 - Unauthenticated Arbitrary Password Protected Post Read
6.5
CVE-2024-1295
The Events Calendar (Free < 6.4.0.1, Pro < 6.4.0.1) - Contributor+ Arbitrary Events Access
5.3
CVE-2026-84741
The Events Calendar 4.5 - 6.17.4.1 - Unauthenticated Non-Public Venue and Organizer Disclosure via REST API
5.3
CVE-2026-13390
The Events Calendar < 6.16.5.1 - Unauthenticated Event Aggregator Import Status Manipulation