kbrain

CVE-2021-43081

MEDIUM · CVSS 6.1EPSS 0.9%EU EUVD

An improper neutralization of input during web page generation vulnerability [CWE-79] in FortiOS version 7.0.3 and below, 6.4.8 and below, 6.2.10 and below, 6.0.14 to 6.0.0. and in FortiProxy version 7.0.1 and below, 2.0.7 to 2.0.0 web filter override form may allow an unauthenticated attacker to perform an XSS attack via crafted HTTP GET requests.

Key facts

CVSS score
6.1 (v3.1)
Severity
MEDIUM
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
EPSS score
0.9% (59th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2021-30034)
Published
May 11, 2022
NVD last modified
June 17, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-30034 in the EU Vulnerability Database. Last updated in EUVD on October 22, 2024.

View on the EU Vulnerability Database

Affected products

  • fortinet / fortios
  • fortinet / fortiproxy

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain