CVE-2023-4021

Description

The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Category

4.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.16%
Third-Party Advisory wordfence.com
Affected: webnus/ Modern Events Calendar Lite
Published at:
Updated at:

References

Link Tags
https://www.wordfence.com/threat-intel/vulnerabilities/id/f213fb42-5bab-4017-80ea-ce6543031af2?source=cve third party advisory
https://webnus.net/modern-events-calendar/change-log/ patch

Frequently Asked Questions

What is the severity of CVE-2023-4021?
CVE-2023-4021 has been scored as a medium severity vulnerability.
How to fix CVE-2023-4021?
To fix CVE-2023-4021, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-4021 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-4021 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-4021?
CVE-2023-4021 affects webnus/ Modern Events Calendar Lite.
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