What is CVE-2020-12815?

CVE-2020-12815 is a medium-severity vulnerability in Fortinet Fortianalyzer, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-09-24.

How severe is CVE-2020-12815?

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

XSS in Fortinet Fortianalyzer

CVE-2020-12815

An improper neutralization of input vulnerability in FortiTester before 3.9.0 may allow a remote authenticated attacker to inject script related HTML tags via IPv4/IPv6 address fields.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-09-24 · 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: 0.009 (56.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Fortinet Fortianalyzer
Fortinet Fortitester — versions FortiTester before 3.9.0
Fortinet Fortitester — versions 3.8.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fortiguard.com/advisory/FG-IR-20-054 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-12815?: CVE-2020-12815 is a medium-severity vulnerability in Fortinet Fortianalyzer, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-09-24.
How severe is CVE-2020-12815?: Medium severity. CVSS v3 base score is 5.4 out of 10.