CVE-2021-24556

6.1 mediumEPSS 1.3%

Medium (6.1) in email-subscriber project email-subscriber. EPSS 1.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.1 medium

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

EPSS: 1.3% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2021-08-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

email-subscriber_project:email-subscriber

References

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

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