CVE-2021-24671: MX Time Zone Clocks < 3.4.1 - Contributor+ Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-09-27 · updated 2026-06-17
Weakness: CWE-79

Description

The MX Time Zone Clocks WordPress plugin before 3.4.1 does not escape the time_zone attribute of the mxmtzc_time_zone_clocks shortcode, allowing users with a role as low as Contributor to perform Stored Cross-Site Scripting attacks

Affected products

MX Time Zone Clocks: before 3.4.1 — fixed in 3.4.1

How to fix

Upgrade to a fixed version: MX Time Zone Clocks 3.4.1. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/4e51dffa-027d-4f3d-a190-dcc5269f6435
https://wpscan.com/vulnerability/4e51dffa-027d-4f3d-a190-dcc5269f6435

Get alerted when CVE-2021-24671 or the next vulnerability affects your stack