CVE-2020-9459

Name: CVE-2020-9459
Creator: NVD / NIST
Published: 2020-02-28T21:15:13.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.02%

Last modified Jun 17, 2026

CVE-2020-9459 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Multiple Stored Cross-site scripting (XSS) vulnerabilities in the Webnus Modern Events Calendar Lite plugin through 5.1.6 for WordPress allows remote authenticated users (with minimal permissions) to inject arbitrary JavaScript, HTML, or CSS via Ajax actions. This affects mec_save_notifications and import_settings.. EPSS estimates a 1.02% chance of exploitation in the next 30 days.

Description

Multiple Stored Cross-site scripting (XSS) vulnerabilities in the Webnus Modern Events Calendar Lite plugin through 5.1.6 for WordPress allows remote authenticated users (with minimal permissions) to inject arbitrary JavaScript, HTML, or CSS via Ajax actions. This affects mec_save_notifications and import_settings.

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

1.02%

59.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Webnus	Modern Events Calendar Lite	<= 5.1.6

References

https://wpvulndb.com/vulnerabilities/10100Exploit, Third Party Advisory
https://www.wordfence.com/blog/2020/02/site-takeover-campaign-exploits-multiple-zero-day-vulnerabilities/Exploit, Third Party Advisory
https://wpvulndb.com/vulnerabilities/10100Exploit, Third Party Advisory
https://www.wordfence.com/blog/2020/02/site-takeover-campaign-exploits-multiple-zero-day-vulnerabilities/Exploit, Third Party Advisory

Timeline

Published: Feb 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9459?

How severe is CVE-2020-9459?

CVE-2020-9459 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.02% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9459?

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-2020-9459?

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

Scan your code now

Source: NVD / NIST