CVE-2021-24556

Public Exploit
Email Subscriber <= 1.1 - Unauthenticated Stored Cross-Site Scripting (XSS)

Description

The kento_email_subscriber_ajax AJAX action of the Email Subscriber WordPress plugin through 1.1, does not properly sanitise, validate and escape the submitted subscribe_email and subscribe_name POST parameters, inserting them in the DB and then outputting them back in the Subscriber list (/wp-admin/edit.php?post_type=kes_campaign&page=kento_email_subscriber_list_settings), leading a Stored XSS issue.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.32% Top 25%
Third-Party Advisory codevigilant.com Third-Party Advisory wpscan.com
Affected: Unknown Email Subscriber
Published at:
Updated at:

References

Link Tags
https://wpscan.com/vulnerability/f050aedc-f79f-4b27-acac-0cdb33b25af8 third party advisory exploit
https://codevigilant.com/disclosure/2021/wp-plugin-email-subscriber/ third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-24556?
CVE-2021-24556 has been scored as a medium severity vulnerability.
How to fix CVE-2021-24556?
To fix CVE-2021-24556, 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-2021-24556 being actively exploited in the wild?
It is possible that CVE-2021-24556 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-24556?
CVE-2021-24556 affects Unknown Email Subscriber.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.