CVE-2023-4298: 123.chat < 1.3.1 - Admin+ Stored XSS

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-09-04 · updated 2026-06-17

Description

The 123.chat WordPress plugin before 1.3.1 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Affected products

123.chat: before 1.3.1 — fixed in 1.3.1

How to fix

Upgrade to a fixed version: 123.chat 1.3.1. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/36285052-8464-4fd6-b4b1-c175e730edad
https://wpscan.com/vulnerability/36285052-8464-4fd6-b4b1-c175e730edad

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