# CVE-2025-5715: Signal App Biometric Authentication missing critical step in authentication

> Attackers with physical access can bypass biometric authentication in the Signal Android app due to a missing critical verification step.

- **Severity:** Low 1.0 (`CVSS:4.0/AV:P/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jun 2025
- **Updated:** 9 Jun 2025
- **Also known as:** GHSA-2g9r-w7mh-f2h2

## What is CVE-2025-5715?

CVE-2025-5715 is a low-severity authentication bypass vulnerability in Signal App, published on 6 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was found in Signal App 7.41.4 on Android. It has been declared as problematic. This vulnerability affects unknown code of the component Biometric Authentication Handler. The manipulation leads to missing critical step in authentication. It is possible to launch the attack on the physical device. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-304 (Missing Critical Step in Authentication)

## Which versions are affected by CVE-2025-5715?

It affects 1 product.


Products: Signal Signal.

## How do I fix CVE-2025-5715?

No fix has been published for CVE-2025-5715 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-5715 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5715 exists.

## Other vulnerabilities in Signal App

- [CVE-2018-16132](https://insights.sbomify.com/CVE-2018-16132/): Denial of service in n/a (high 8.6)
- [CVE-2022-28345](https://insights.sbomify.com/CVE-2022-28345/): Other in n/a (high 7.5)
- [CVE-2018-9840](https://insights.sbomify.com/CVE-2018-9840/): Security feature bypass in n/a (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-5715 and fix it if it is affected.

What it is: CVE-2025-5715 is a low-severity authentication bypass vulnerability in Signal App, published on 6 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5715 exists.

Affected product: Signal App. 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-2025-5715/ (Markdown: https://insights.sbomify.com/CVE-2025-5715/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-5715
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-5715
- OSV: https://osv.dev/vulnerability/CVE-2025-5715

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-5715/
Summaries are generated and may contain mistakes; the official description above is the record.