# CVE-2021-43360: Sunnet eHRD - Insecure Deserialization

> A post-authenticated attacker with database access can execute arbitrary code or disrupt services via insecure deserialization in the email scheduling task.

- **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:** No
- **Published:** 1 Dec 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-3r5m-qgj5-854w

## What is CVE-2021-43360?

CVE-2021-43360 is a high-severity unsafe deserialization vulnerability in Sunnet eHRD, published on 1 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Sunnet eHRD e-mail delivery task schedule’s serialization function has inadequate input object validation and restriction, which allows a post-authenticated remote attacker with database access privilege, to execute arbitrary code and control the system or interrupt services.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2021-43360?

It affects 1 product.


Products: Sun Ehrd.

## How do I fix CVE-2021-43360?

No fix has been published for CVE-2021-43360 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-43360 being exploited?

There is no known exploitation of CVE-2021-43360 in the wild and no public exploit code.

## Other vulnerabilities in Sunnet eHRD

- [CVE-2021-43359](https://insights.sbomify.com/CVE-2021-43359/): Sunnet eHRD - Broken Access Control (high 8.8)
- [CVE-2020-10510](https://insights.sbomify.com/CVE-2020-10510/): Sunnet eHRD - Broken Access Control (high 8.1)
- [CVE-2021-43358](https://insights.sbomify.com/CVE-2021-43358/): Sunnet eHRD - Path Traversal (high 7.5)
- [CVE-2020-10508](https://insights.sbomify.com/CVE-2020-10508/): Sunnet eHRD - Sensitive Data Exposure (high 7.5)
- [CVE-2020-10509](https://insights.sbomify.com/CVE-2020-10509/): Sunnet eHRD - Cross-Site Scripting (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-43360 and fix it if it is affected.

What it is: CVE-2021-43360 is a high-severity unsafe deserialization vulnerability in Sunnet eHRD, published on 1 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-43360 in the wild and no public exploit code.

Affected product: Sunnet eHRD. 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-2021-43360/ (Markdown: https://insights.sbomify.com/CVE-2021-43360/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-43360
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-43360
- OSV: https://osv.dev/vulnerability/CVE-2021-43360

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-43360/
Summaries are generated and may contain mistakes; the official description above is the record.