CVE-2021-24556

MEDIUM 6.1CVE-2021-24556 · Published 23/08/2021 · updated 17/06/2026

In short

CVE-2021-24556 is a MEDIUM (CVSS 6.1) vulnerability affecting email-subscriber (email-subscriber project).
Chance of exploitation in the next 30 days (EPSS): 1.3%, higher than 71.6% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
email-subscriber email-subscriber_project	`≤ 1.1`	No fix yet

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.

References

codevigilant.com/disclosure/2021/wp-plugin-email-subscriber · Exploit
wpscan.com/vulnerability/f050aedc-f79f-4b27-acac-0cdb33b25af8 · Exploit

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