# CVE-2020-6644: Auth bypass in Fortinet FortiDeceptor

> Attackers can reuse unexpired admin session IDs to gain administrative privileges in FortiDeceptor if they obtain the session ID.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jun 2020
- **Updated:** 25 Oct 2024
- **Also known as:** GHSA-g45q-mxhw-4vfh

## What is CVE-2020-6644?

CVE-2020-6644 is a high-severity authentication bypass vulnerability in Fortinet FortiDeceptor, published on 22 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An insufficient session expiration vulnerability in FortiDeceptor 3.0.0 and below allows an attacker to reuse the unexpired admin user session IDs to gain admin privileges, should the attacker be able to obtain that session ID via other, hypothetical attacks.

Weakness: CWE-613 (DEPRECATED: Insufficient Session Expiration)

## Which versions are affected by CVE-2020-6644?

It affects 1 product.


Products: Fortinet Fortideceptor.

## How do I fix CVE-2020-6644?

No fix has been published for CVE-2020-6644 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-6644 being exploited?

There is no known exploitation of CVE-2020-6644 in the wild and no public exploit code.

## Other vulnerabilities in Fortinet FortiDeceptor

- [CVE-2020-29017](https://insights.sbomify.com/CVE-2020-29017/): Command injection in Fortinet FortiDeceptor (high 8.8)
- [CVE-2022-27487](https://insights.sbomify.com/CVE-2022-27487/): Missing authorization in FortiDeceptor (high 8.3)
- [CVE-2022-38373](https://insights.sbomify.com/CVE-2022-38373/): Cross-site scripting in Fortinet FortiDeceptor (high 8.0)
- [CVE-2022-30302](https://insights.sbomify.com/CVE-2022-30302/): Path traversal in Fortinet FortiDeceptor (medium 6.5)
- [CVE-2026-25689](https://insights.sbomify.com/CVE-2026-25689/): Command injection in FortiDeceptor (medium 6.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-6644 and fix it if it is affected.

What it is: CVE-2020-6644 is a high-severity authentication bypass vulnerability in Fortinet FortiDeceptor, published on 22 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-6644 in the wild and no public exploit code.

Affected product: Fortinet FortiDeceptor. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-6644/ (Markdown: https://insights.sbomify.com/CVE-2020-6644/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-6644
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-6644
- OSV: https://osv.dev/vulnerability/CVE-2020-6644

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-6644/
Summaries are generated and may contain mistakes; the official description above is the record.