# CVE-2019-3566: Information disclosure in WhatsApp Business for Android

> An attacker with account takeover and metadata knowledge can recover previously sent messages in WhatsApp for Android.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 May 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-9vw8-5c3c-w435

## What is CVE-2019-3566?

CVE-2019-3566 is a medium-severity vulnerability in Facebook WhatsApp Business for Android, published on 10 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A bug in WhatsApp for Android's messaging logic would potentially allow a malicious individual who has taken over over a WhatsApp user's account to recover previously sent messages. This behavior requires independent knowledge of metadata for previous messages, which are not available publicly. This issue affects WhatsApp for Android 2.19.52 and 2.19.54 - 2.19.103, as well as WhatsApp Business for Android starting in v2.19.22 until v2.19.38.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2019-3566?

It affects 2 products.


Products: Whatsapp Whatsapp, Whatsapp Whatsapp Business.

## How do I fix CVE-2019-3566?

No fix has been published for CVE-2019-3566 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-3566 being exploited?

There is no known exploitation of CVE-2019-3566 in the wild and no public exploit code.

## Other vulnerabilities in Facebook WhatsApp Business for Android

- [CVE-2019-3568](https://insights.sbomify.com/CVE-2019-3568/): WhatsApp VOIP Stack Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2019-18426](https://insights.sbomify.com/CVE-2019-18426/): WhatsApp Cross-Site Scripting (high 8.2, exploited in the wild)
- [CVE-2025-55177](https://insights.sbomify.com/CVE-2025-55177/): Meta Platforms WhatsApp Incorrect Authorization (medium 5.4, exploited in the wild)
- [CVE-2022-36934](https://insights.sbomify.com/CVE-2022-36934/): Integer overflow in WhatsApp Business for Android (critical 9.8)
- [CVE-2021-24042](https://insights.sbomify.com/CVE-2021-24042/): Memory corruption in WhatsApp Business for Android (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-3566 and fix it if it is affected.

What it is: CVE-2019-3566 is a medium-severity vulnerability in Facebook WhatsApp Business for Android, published on 10 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-3566 in the wild and no public exploit code.

Affected product: Facebook WhatsApp Business for Android. 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-2019-3566/ (Markdown: https://insights.sbomify.com/CVE-2019-3566/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-3566
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-3566
- OSV: https://osv.dev/vulnerability/CVE-2019-3566

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-3566/
Summaries are generated and may contain mistakes; the official description above is the record.