# CVE-2021-38000: Google Chromium Intents Improper Input Validation

> Remote attackers can redirect users to malicious URLs via crafted HTML pages due to insufficient input validation in Android Chrome intents.

- **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:** Yes, since 3 Nov 2021 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 23 Nov 2021
- **Updated:** 21 Oct 2025
- **Also known as:** DEBIAN-CVE-2021-38000, GHSA-xrj7-4gfh-q9h7, UBUNTU-CVE-2021-38000

## What is CVE-2021-38000?

CVE-2021-38000 is a medium-severity vulnerability in Debian Debian Linux, published on 23 Nov 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

Insufficient validation of untrusted input in Intents in Google Chrome on Android prior to 95.0.4638.69 allowed a remote attacker to arbitrarily browser to a malicious URL via a crafted HTML page.

Weakness: CWE-601 (URL Redirection to Untrusted Site), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-38000?

It affects 3 products.


Products: Debian Debian Linux, Fedoraproject Fedora, Google Chrome.

## How do I fix CVE-2021-38000?

Upgrade to a fixed version. US federal agencies must fix it by 17 Nov 2021.

## Is CVE-2021-38000 being exploited?

Yes. Attackers have exploited CVE-2021-38000 in the wild since at least 3 Nov 2021.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-38000 and fix it if it is affected.

What it is: CVE-2021-38000 is a medium-severity vulnerability in Debian Debian Linux, published on 23 Nov 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: Yes. Attackers have exploited CVE-2021-38000 in the wild since at least 3 Nov 2021.

Affected product: Debian Debian Linux. 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-2021-38000/ (Markdown: https://insights.sbomify.com/CVE-2021-38000/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-38000
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-38000
- OSV: https://osv.dev/vulnerability/CVE-2021-38000

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-38000/
Summaries are generated and may contain mistakes; the official description above is the record.