# CVE-2020-11467: Deserialization in n/a

> Attackers can achieve remote code execution in Deskpro by abusing Twig template variables to trigger unsafe deserialization via POP gadgets.

- **Severity:** Critical 9.1 (`CVSS:3.0/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:C/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-mhpq-2ph4-jm64

## What is CVE-2020-11467?

CVE-2020-11467 is a critical unsafe deserialization vulnerability in n/a, published on 1 Apr 2020. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

An issue was discovered in Deskpro before 2019.8.0. This product enables administrators to modify the helpdesk interface by editing /portal/api/style/edit-theme-set/template-sources theme templates, and uses TWIG as its template engine. While direct access to self and _self variables was not permitted, one could abuse the accessible variables in one's context to reach a native unserialize function via the code parameter. There, on could pass a crafted payload to trigger a set of POP gadgets in order to achieve remote code execution.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2020-11467?

It affects 1 product.


Products: Deskpro Deskpro.

## How do I fix CVE-2020-11467?

No fix has been published for CVE-2020-11467 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-11467 being exploited?

There is no known exploitation of CVE-2020-11467 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-11465](https://insights.sbomify.com/CVE-2020-11465/): Missing authorization in n/a (high 8.8)
- [CVE-2020-11466](https://insights.sbomify.com/CVE-2020-11466/): Missing authorization in n/a (high 7.6)
- [CVE-2020-11463](https://insights.sbomify.com/CVE-2020-11463/): Missing authorization in n/a (high 7.5)
- [CVE-2021-35391](https://insights.sbomify.com/CVE-2021-35391/): Server-side request forgery in n/a (high 7.2)
- [CVE-2006-6159](https://insights.sbomify.com/CVE-2006-6159/): Cross-site scripting in n/a (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-11467 and fix it if it is affected.

What it is: CVE-2020-11467 is a critical unsafe deserialization vulnerability in n/a, published on 1 Apr 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-11467 in the wild and no public exploit code.

Affected product: n/a. 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-2020-11467/ (Markdown: https://insights.sbomify.com/CVE-2020-11467/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-11467
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-11467
- OSV: https://osv.dev/vulnerability/CVE-2020-11467

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-11467/
Summaries are generated and may contain mistakes; the official description above is the record.