What is CVE-2020-11457?

CVE-2020-11457 is a medium-severity vulnerability in Netgate Pfsense, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-04-01.

How severe is CVE-2020-11457?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2020-11457 known to be exploited?

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

XSS in Netgate Pfsense

CVE-2020-11457

pfSense before 2.4.5 has stored XSS in system_usermanager_addprivs.php in the WebGUI via the descr parameter (aka full name) of a user.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.093 (95.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.093 · newest: 0.093 · change: 0.000

Affected products

Netgate Pfsense

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

www.netgate.com/assets/downloads/advisories/pfSense-SA-20_06.webgui.asc (Patch, Vendor Advisory)
github.com/pfsense/pfsense/commit/3c1e53dabe966f27c9097a5a923e77f49ae5fffa (Patch, Third Party Advisory)
packetstormsecurity.com/files/157104/pfSense-2.4.4-P3-User-Manager-Cross-Site-S…
www.exploit-db.com/exploits/48300 (exploit)

Frequently asked questions

What is CVE-2020-11457?: CVE-2020-11457 is a medium-severity vulnerability in Netgate Pfsense, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-04-01.
How severe is CVE-2020-11457?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-11457 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.