# CVE-2021-32683: XSS through createObjectURL

> An attacker can execute malicious scripts on the Wire web app domain by tricking users into opening crafted image URLs, leading to full account takeover.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **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:** 15 Jun 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-382j-mmc8-m5rw

## What is CVE-2021-32683?

CVE-2021-32683 is a high-severity cross-site scripting vulnerability in wireapp wire-webapp, published on 15 Jun 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

wire-webapp is the web version of Wire, an open-source messenger. A cross-site scripting vulnerability exists in wire-webapp prior to version 2021-06-01-production.0. If a user is instructed to open an image in a new tab (right click -> open in new tab, or copy the URL and paste it in the URL bar), an the image payload is executed on the domain hosting the app (app.wire.com). In particular, if an image contains malicious code in addition to the actual picture, this code is executed on app.wire.com. This allows the attacker to fully control the user account. The vulnerability was patched in version 2021-06-01-production.0. As a workaround, users should not try to open image URLs.

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

## Which versions are affected by CVE-2021-32683?

It affects 1 product.


Products: Wire Wire-Webapp.

## How do I fix CVE-2021-32683?

No fix has been published for CVE-2021-32683 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-32683 being exploited?

There is no known exploitation of CVE-2021-32683 in the wild and no public exploit code.

## Other vulnerabilities in wireapp wire-webapp

- [CVE-2022-29168](https://insights.sbomify.com/CVE-2022-29168/): Cross Site Scripting in Wire Messages (critical 9.6)
- [CVE-2022-24799](https://insights.sbomify.com/CVE-2022-24799/): Cross Site Scripting in Wire Webapp (critical 9.6)
- [CVE-2021-21400](https://insights.sbomify.com/CVE-2021-21400/): Entering code in App Lock modal sends input to conversation (high 7.1)
- [CVE-2025-48066](https://insights.sbomify.com/CVE-2025-48066/): wire-webapp has no database deletion on client logout (medium 6.0)
- [CVE-2022-39380](https://insights.sbomify.com/CVE-2022-39380/): wire-webapp contains Improper Handling of Exceptional Conditions leading to a DoS via Markdown Rendering (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-32683 and fix it if it is affected.

What it is: CVE-2021-32683 is a high-severity cross-site scripting vulnerability in wireapp wire-webapp, published on 15 Jun 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-2021-32683 in the wild and no public exploit code.

Affected product: wireapp wire-webapp. 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-2021-32683/ (Markdown: https://insights.sbomify.com/CVE-2021-32683/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-32683
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-32683
- OSV: https://osv.dev/vulnerability/CVE-2021-32683

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-32683/
Summaries are generated and may contain mistakes; the official description above is the record.