What is CVE-2022-23993?

CVE-2022-23993 is a medium-severity vulnerability in Pfsense, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-26.

How severe is CVE-2022-23993?

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

XSS in Pfsense

CVE-2022-23993

/usr/local/www/pkg.php in pfSense CE before 2.6.0 and pfSense Plus before 22.01 uses $_REQUEST['pkg_filter'] in a PHP echo call, causing XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-01-26 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.015 (73.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/pfsense/pfsense/commit/5d82cce0d615a76b738798577a28a15803e59aeb (Patch, Third Party Advisory)
docs.netgate.com/downloads/pfSense-SA-22_04.webgui.asc (Third Party Advisory)

Frequently asked questions

What is CVE-2022-23993?: CVE-2022-23993 is a medium-severity vulnerability in Pfsense, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-26.
How severe is CVE-2022-23993?: Medium severity. CVSS v3 base score is 6.1 out of 10.