What is CVE-2021-43032?

CVE-2021-43032 is a medium-severity vulnerability in Xenforo, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-11-03.

How severe is CVE-2021-43032?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Is CVE-2021-43032 known to be exploited?

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

XSS in Xenforo

CVE-2021-43032

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.009 (55.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Xenforo
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-43032?: CVE-2021-43032 is a medium-severity vulnerability in Xenforo, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-11-03.
How severe is CVE-2021-43032?: Medium severity. CVSS v3 base score is 4.8 out of 10.
Is CVE-2021-43032 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.