# CVE-2025-43916: Open redirect in api.sonos.com

> Attackers can exploit an open redirect in the OAuth login endpoint to steal authorization codes, potentially leading to account takeover.

- **Severity:** Low 3.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/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:** 21 Apr 2025
- **Updated:** 21 Apr 2025
- **Also known as:** GHSA-g2wh-gmwq-2gmc

## What is CVE-2025-43916?

CVE-2025-43916 is a low-severity vulnerability in api.sonos.com, published on 21 Apr 2025. 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

Sonos api.sonos.com through 2025-04-21, when the /login/v3/oauth endpoint is used, accepts a redirect_uri containing userinfo in the authority component, which is not consistent with RFC 6819 section 5.2.3.5. An authorization code may be sent to an attacker-controlled destination. This might have further implications in conjunction with "Decompiling the app revealed a hardcoded secret."

Weakness: CWE-647 (Use of Non-Canonical URL Paths for Authorization Decisions)

## Which versions are affected by CVE-2025-43916?


## How do I fix CVE-2025-43916?

No fix has been published for CVE-2025-43916 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-43916 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-43916 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-43916 and fix it if it is affected.

What it is: CVE-2025-43916 is a low-severity vulnerability in api.sonos.com, published on 21 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-43916 exists.

Affected product: api.sonos.com. 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-2025-43916/ (Markdown: https://insights.sbomify.com/CVE-2025-43916/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-43916
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-43916
- OSV: https://osv.dev/vulnerability/CVE-2025-43916

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-43916/
Summaries are generated and may contain mistakes; the official description above is the record.