# CVE-2019-1218: Outlook iOS Spoofing Vulnerability

> An attacker can execute arbitrary scripts in the victim's context by sending a crafted email to Outlook iOS users.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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 Aug 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-m3wq-w5qf-gpqg

## What is CVE-2019-1218?

CVE-2019-1218 is a medium-severity cross-site scripting vulnerability in Microsoft Outlook, published on 14 Aug 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A spoofing vulnerability exists in the way Microsoft Outlook iOS software parses specifically crafted email messages. An authenticated attacker could exploit the vulnerability by sending a specially crafted email message to a victim.
The attacker who successfully exploited this vulnerability could then perform cross-site scripting attacks on the affected systems and run scripts in the security context of the current user.
The security update addresses the vulnerability by correcting how Outlook iOS parses specially crafted email messages.

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

## Which versions are affected by CVE-2019-1218?

It affects 1 product.


Products: Microsoft Outlook.

## How do I fix CVE-2019-1218?

No fix has been published for CVE-2019-1218 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1218 being exploited?

There is no known exploitation of CVE-2019-1218 in the wild and no public exploit code.

Public exploit code:

- Outlook iOS Spoofing Vulnerability (github_poc): https://github.com/d0gukank/CVE-2019-1218

## Other vulnerabilities in Microsoft Outlook

- [CVE-2017-11774](https://insights.sbomify.com/CVE-2017-11774/): Microsoft Office Outlook Security Feature Bypass (high 7.8, exploited in the wild)
- [CVE-2001-0538](https://insights.sbomify.com/CVE-2001-0538/): Code injection in n/a (critical 10.0)
- [CVE-2013-3870](https://insights.sbomify.com/CVE-2013-3870/): Use after free in n/a (critical 9.3)
- [CVE-2010-2728](https://insights.sbomify.com/CVE-2010-2728/): Memory corruption in n/a (critical 9.3)
- [CVE-2010-0266](https://insights.sbomify.com/CVE-2010-0266/): Code injection in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1218 and fix it if it is affected.

What it is: CVE-2019-1218 is a medium-severity cross-site scripting vulnerability in Microsoft Outlook, published on 14 Aug 2019. 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-2019-1218 in the wild and no public exploit code.

Affected product: Microsoft Outlook. 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-2019-1218/ (Markdown: https://insights.sbomify.com/CVE-2019-1218/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1218
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1218
- OSV: https://osv.dev/vulnerability/CVE-2019-1218

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1218/
Summaries are generated and may contain mistakes; the official description above is the record.