# CVE-2021-27945: Cross-site scripting in n/a

> Reflected XSS in Squirro Insights Engine allows attackers to inject malicious scripts, potentially stealing session tokens and credentials from users.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **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:** 8 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-ff96-vc76-rx72

## What is CVE-2021-27945?

CVE-2021-27945 is a medium-severity cross-site scripting vulnerability in n/a, published on 8 Apr 2021. 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

The Squirro Insights Engine was affected by a Reflected Cross-Site Scripting (XSS) vulnerability affecting versions 2.0.0 up to and including 3.2.4. An attacker can use the vulnerability to inject malicious JavaScript code into the application, which will execute within the browser of any user who views the relevant application content. The attacker-supplied code can perform a wide variety of actions, such as stealing victims' session tokens or login credentials, performing arbitrary actions on their behalf, and logging their keystrokes.

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

## Which versions are affected by CVE-2021-27945?

It affects 1 product.


Products: Squirro Squirro.

## How do I fix CVE-2021-27945?

No fix has been published for CVE-2021-27945 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27945 being exploited?

There is no known exploitation of CVE-2021-27945 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27945 and fix it if it is affected.

What it is: CVE-2021-27945 is a medium-severity cross-site scripting vulnerability in n/a, published on 8 Apr 2021. 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-2021-27945 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-2021-27945/ (Markdown: https://insights.sbomify.com/CVE-2021-27945/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27945
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27945
- OSV: https://osv.dev/vulnerability/CVE-2021-27945

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27945/
Summaries are generated and may contain mistakes; the official description above is the record.