TI-2023-04273 Aliases CVE-2023-4635 GHSA-836w-q8xf-8mq9

EventON <= 2.2.2 - Reflected Cross-Site Scripting

LOW 29CWE-79Published 2023-10-21 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The EventON plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'tab' parameter in versions up to, and including, 2.2.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00741 54th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ashanjay	EventON – Events Calendar	up to 2.2.2	—	No fix listed	CNA

EventON – Events Calendar Vendorashanjay Affected up to 2.2.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:myeventon:eventon-lite::::::wordpress::*	up to 2.2.2	Vulnerable	ashanjay

cpe:2.3:a:myeventon:eventon-lite:*:*:*:*:*:wordpress:*:* Versions up to 2.2.2 Vulnerable ·ashanjay

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-4635
2026-10-03 Alias added: GHSA-836w-q8xf-8mq9
2026-10-23 EPSS moved to the 50th–90th percentile

References

Exploit 2

Other 1

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2981861%40eventon-lite&new=2981861%40eventon-lite&sfp_email=&sfph_mail=

TI-2023-05663 Missing authorization in ashanjay EventON – Events Calendar CVSS 3.1MEDIUM 6.5
TI-2023-05735 Cross-site request forgery in ashanjay EventON – Events Calendar CVSS 3.1MEDIUM 6.5
TI-2023-05733 Cross-site request forgery in ashanjay EventON – Events Calendar CVSS 3.1MEDIUM 6.5
TI-2023-05734 EventON PRO - WordPress Virtual Event Calendar Plugin <= 4.6.8 - Cross-Site Request Forgery via admin_test_email CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences