# CVE-2021-40335: Cross Site Request Forgery (CSRF) in Hitachi Energy’s MSM Product

> An attacker can trick authenticated users into performing unauthorized actions on the Hitachi Energy MSM web interface via a forged link.

- **Severity:** Medium 5.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 Jul 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-5536-vjqw-29vh

## What is CVE-2021-40335?

CVE-2021-40335 is a medium-severity vulnerability in Hitachi Energy MSM, published on 25 Jul 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability exists in the HTTP web interface where the web interface does not sufficiently verify if a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. This cause a Cross Site Request Forgery (CSRF), which if exploited could lead an attacker to gain unauthorized access to the web application and perform an unwanted operation on it without the knowledge of the legitimate user. An attacker, who successfully makes an MSM user who has already established a session to MSM web interface clicks a forged link to the MSM web interface, e.g., link is sent per E-Mail, could perform harmful command on MSM through its web server interface. This issue affects: Hitachi Energy MSM V2.2 and prior versions.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2021-40335?

It affects 1 product.


Products: Hitachienergy Modular Switchgear Monitoring Firmware.

## How do I fix CVE-2021-40335?

No fix has been published for CVE-2021-40335 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40335 being exploited?

There is no known exploitation of CVE-2021-40335 in the wild and no public exploit code.

## Other vulnerabilities in Hitachi Energy MSM

- [CVE-2021-40336](https://insights.sbomify.com/CVE-2021-40336/): HTTP Response Splitting in Hitachi Energy’s MSM Product (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40335 and fix it if it is affected.

What it is: CVE-2021-40335 is a medium-severity vulnerability in Hitachi Energy MSM, published on 25 Jul 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-40335 in the wild and no public exploit code.

Affected product: Hitachi Energy MSM. 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-2021-40335/ (Markdown: https://insights.sbomify.com/CVE-2021-40335/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40335
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40335
- OSV: https://osv.dev/vulnerability/CVE-2021-40335

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40335/
Summaries are generated and may contain mistakes; the official description above is the record.