# CVE-2020-8813: Command injection in n/a

> Remote attackers can execute arbitrary OS commands via shell metacharacters in a cookie if guest users have graph real-time privileges.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-8813, GHSA-gg99-fwr4-rcj9, UBUNTU-CVE-2020-8813

## What is CVE-2020-8813?

CVE-2020-8813 is a high-severity command injection vulnerability in Cacti Cacti, published on 22 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

graph_realtime.php in Cacti 1.2.8 allows remote attackers to execute arbitrary OS commands via shell metacharacters in a cookie, if a guest user has the graph real-time privilege.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2020-8813?

It affects 5 products.


Products: Cacti Cacti, Debian Debian Linux, Fedoraproject Fedora, Opensuse Suse Package Hub, Opmantek Open-Audit.

## How do I fix CVE-2020-8813?

Upgrade to a fixed version.

## Is CVE-2020-8813 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8813 exists.

Public exploit code:

- The official exploit for Cacti v1.2.8 Remote Code Execution CVE-2020-8813 (github_poc): https://github.com/mhaskar/CVE-2020-8813
- CVE-2020-8813 - RCE through graph_realtime.php in Cacti 1.2.8 (github_poc): https://github.com/p0dalirius/CVE-2020-8813-Cacti-RCE-in-graph_realtime
- https://github.com/0xm4ud/Cacti-CVE-2020-8813 (github_poc): https://github.com/0xm4ud/Cacti-CVE-2020-8813
- Cacti v1.2.8 Unauthenticated Remote Code Execution (github_poc): https://github.com/hexcowboy/CVE-2020-8813
- Cacti 1.2.8 - Authenticated Remote Code Execution (exploitdb)
- Cacti 1.2.8 - Unauthenticated Remote Code Execution (exploitdb)

## Other vulnerabilities in Cacti Cacti

- [CVE-2022-46169](https://insights.sbomify.com/CVE-2022-46169/): Cacti Command Injection (critical 9.8, exploited in the wild)
- [CVE-2026-39893](https://insights.sbomify.com/CVE-2026-39893/): Cacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php (critical 9.8)
- [CVE-2026-39938](https://insights.sbomify.com/CVE-2026-39938/): Cacti: Unauthenticated RCE on Graph Image (critical 9.8)
- [CVE-2026-39955](https://insights.sbomify.com/CVE-2026-39955/): Cacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php (critical 9.8)
- [CVE-2023-39361](https://insights.sbomify.com/CVE-2023-39361/): Unauthenticated SQL Injection in graph_view.php in Cacti (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8813 and fix it if it is affected.

What it is: CVE-2020-8813 is a high-severity command injection vulnerability in Cacti Cacti, published on 22 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8813 exists.

Affected product: Cacti Cacti. 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-2020-8813/ (Markdown: https://insights.sbomify.com/CVE-2020-8813/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8813
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8813
- OSV: https://osv.dev/vulnerability/CVE-2020-8813

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8813/
Summaries are generated and may contain mistakes; the official description above is the record.