What is CVE-2022-3709?

CVE-2022-3709 is a medium-severity vulnerability in Sophos Firewall, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2022-12-01.

How severe is CVE-2022-3709?

Medium severity. CVSS v3 base score is 6.8 out of 10.

XSS in Sophos Firewall

CVE-2022-3709

A stored XSS vulnerability allows admin to super-admin privilege escalation in the Webadmin import group wizard of Sophos Firewall releases older than version 19.5 GA.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-12-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.sophos.com/en-us/security-advisories/sophos-sa-20221201-sfos-19-5-0 (Vendor Advisory)

Frequently asked questions

What is CVE-2022-3709?: CVE-2022-3709 is a medium-severity vulnerability in Sophos Firewall, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2022-12-01.
How severe is CVE-2022-3709?: Medium severity. CVSS v3 base score is 6.8 out of 10.