CVE-2019-11843

Name: CVE-2019-11843
Creator: NVD / NIST
Published: 2020-06-02T17:15:11.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.80%

Last modified Jun 17, 2026

CVE-2019-11843 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The MailPoet plugin before 3.23.2 for WordPress allows remote attackers to inject arbitrary web script or HTML using extra parameters in the URL (Reflective Server-Side XSS).. EPSS estimates a 1.80% chance of exploitation in the next 30 days.

Description

The MailPoet plugin before 3.23.2 for WordPress allows remote attackers to inject arbitrary web script or HTML using extra parameters in the URL (Reflective Server-Side XSS).

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.80%

75.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Automattic	Mailpoet	< 3.23.2

References

https://github.com/mailpoet/mailpoet/releases/tag/3.23.2Release Notes, Third Party Advisory
https://pluginarchive.com/wordpress/mailpoet/v/3-23-2Release Notes, Third Party Advisory
https://wordpress.org/plugins/mailpoet/#developersRelease Notes, Third Party Advisory
https://github.com/mailpoet/mailpoet/releases/tag/3.23.2Release Notes, Third Party Advisory
https://pluginarchive.com/wordpress/mailpoet/v/3-23-2Release Notes, Third Party Advisory
https://wordpress.org/plugins/mailpoet/#developersRelease Notes, Third Party Advisory

Timeline

Published: Jun 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11843?

The MailPoet plugin before 3.23.2 for WordPress allows remote attackers to inject arbitrary web script or HTML using extra parameters in the URL (Reflective Server-Side XSS).

How severe is CVE-2019-11843?

CVE-2019-11843 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11843?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-11843?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST