# CVE-2021-27887: Stored XSS vulnerability in Ellipse APM

> Authenticated users can inject malicious scripts into the Ellipse APM dashboard, potentially executing code in victims' browsers.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Jun 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-wrwg-x39f-9cmf

## What is CVE-2021-27887?

CVE-2021-27887 is a medium-severity cross-site scripting vulnerability in n/a, published on 14 Jun 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Cross-site Scripting (XSS) vulnerability in the main dashboard of Ellipse APM versions allows an authenticated user or integrated application to inject malicious data into the application that can then be executed in a victim’s browser. This issue affects: Hitachi ABB Power Grids Ellipse APM 5.3 version 5.3.0.1 and prior versions; 5.2 version 5.2.0.3 and prior versions; 5.1 version 5.1.0.6 and prior versions.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-27887?

It affects 1 product.


Products: Hitachiabb-Powergrids Ellipse Asset Performance Management.

## How do I fix CVE-2021-27887?

No fix has been published for CVE-2021-27887 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27887 being exploited?

There is no known exploitation of CVE-2021-27887 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27887 and fix it if it is affected.

What it is: CVE-2021-27887 is a medium-severity cross-site scripting vulnerability in n/a, published on 14 Jun 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-27887 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-2021-27887/ (Markdown: https://insights.sbomify.com/CVE-2021-27887/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27887
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27887
- OSV: https://osv.dev/vulnerability/CVE-2021-27887

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27887/
Summaries are generated and may contain mistakes; the official description above is the record.