CVE-2021-24671

Name: CVE-2021-24671
Creator: NVD / NIST
Published: 2021-09-27T16:15:09.213+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.60%

Last modified Jun 17, 2026

CVE-2021-24671 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.60%

44.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mx Time Zone Clocks Project	Mx Time Zone Clocks	< 3.4.1

References

https://wpscan.com/vulnerability/4e51dffa-027d-4f3d-a190-dcc5269f6435Exploit, Third Party Advisory
https://wpscan.com/vulnerability/4e51dffa-027d-4f3d-a190-dcc5269f6435Exploit, Third Party Advisory

Timeline

Published: Sep 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24671?

How severe is CVE-2021-24671?

CVE-2021-24671 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24671?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24671?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST