CVE-2021-43032

Name: CVE-2021-43032
Creator: NVD / NIST
Published: 2021-11-03T20:15:09.09+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2021-43032 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. In XenForo through 2.2.7, a threat actor with access to the admin panel can create a new Advertisement via the Advertising function, and save an XSS payload in the body of the HTML document. This payload will execute globally on the client side.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

In XenForo through 2.2.7, a threat actor with access to the admin panel can create a new Advertisement via the Advertising function, and save an XSS payload in the body of the HTML document. This payload will execute globally on the client side.

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

0.90%

54.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Xenforo	Xenforo	<= 2.2.7

References

https://github.com/SakuraSamuraii/CVE-2021-43032Exploit, Third Party Advisory
https://xenforo.com/community/forums/announcements/Release Notes, Vendor Advisory
https://github.com/SakuraSamuraii/CVE-2021-43032Exploit, Third Party Advisory
https://xenforo.com/community/forums/announcements/Release Notes, Vendor Advisory

Timeline

Published: Nov 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43032?

How severe is CVE-2021-43032?

CVE-2021-43032 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43032?

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-2021-43032?

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

Scan your code now

Source: NVD / NIST