CVE-2021-38359

Name: CVE-2021-38359
Creator: NVD / NIST
Published: 2021-09-10T14:15:11.18+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2021-38359 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The WordPress InviteBox Plugin for viral Refer-a-Friend Promotions WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the message parameter found in the ~/admin/admin.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.1.. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

The WordPress InviteBox Plugin for viral Refer-a-Friend Promotions WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the message parameter found in the ~/admin/admin.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.1.

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

0.79%

51.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Invitebox	Invitebox	<= 1.4.1

References

https://plugins.trac.wordpress.org/browser/refer-a-friend-widget-for-wp/tags/1.4.1/admin/admin.php#L75Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38359Third Party Advisory
https://plugins.trac.wordpress.org/browser/refer-a-friend-widget-for-wp/tags/1.4.1/admin/admin.php#L75Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38359Third Party Advisory

Timeline

Published: Sep 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38359?

How severe is CVE-2021-38359?

CVE-2021-38359 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38359?

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-2021-38359?

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

Scan your code now

Source: NVD / NIST