# CVE-2021-27182: Cross-site scripting in n/a

> An IFRAME injection vulnerability in MDaemon Webmail allows attackers to perform actions with the victim's privileges via malicious email.

- **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:** 14 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-xqqm-w483-3fhq

## What is CVE-2021-27182?

CVE-2021-27182 is a high-severity cross-site scripting vulnerability in n/a, published on 14 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue was discovered in MDaemon before 20.0.4. There is an IFRAME injection vulnerability in Webmail (aka WorldClient). It can be exploited via an email message. It allows an attacker to perform any action with the privileges of the attacked user.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2021-27182?

It affects 1 product.


Products: Altn Mdaemon.

## How do I fix CVE-2021-27182?

No fix has been published for CVE-2021-27182 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27182 being exploited?

There is no known exploitation of CVE-2021-27182 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-27181](https://insights.sbomify.com/CVE-2021-27181/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2021-27183](https://insights.sbomify.com/CVE-2021-27183/): Path traversal in n/a (high 7.2)
- [CVE-2008-1358](https://insights.sbomify.com/CVE-2008-1358/): Memory corruption in n/a (medium 6.5)
- [CVE-2021-27180](https://insights.sbomify.com/CVE-2021-27180/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2019-8983](https://insights.sbomify.com/CVE-2019-8983/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27182 and fix it if it is affected.

What it is: CVE-2021-27182 is a high-severity cross-site scripting vulnerability in n/a, published on 14 Apr 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-2021-27182 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-2021-27182/ (Markdown: https://insights.sbomify.com/CVE-2021-27182/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27182
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27182
- OSV: https://osv.dev/vulnerability/CVE-2021-27182

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27182/
Summaries are generated and may contain mistakes; the official description above is the record.