What is CVE-2021-24556?

CVE-2021-24556 is a medium-severity vulnerability in Email-Subscriber Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-23.

How severe is CVE-2021-24556?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-24556 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Email-Subscriber Project

CVE-2021-24556

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.013 (69.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Email-subscriber_project Email-subscriber
Unknown Email Subscriber — versions 1.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)
contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-24556?: CVE-2021-24556 is a medium-severity vulnerability in Email-Subscriber Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-23.
How severe is CVE-2021-24556?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-24556 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.