# CVE-2021-32658: Sensitive data may not be removed from storage on account removal

> Attackers with physical access may recover sensitive encryption keys from Nextcloud Android app storage after account removal due to cleanup timeouts.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **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:** Yes
- **Published:** 8 Jun 2021
- **Updated:** 3 Aug 2024
- **Also known as:** BIT-nextcloud-2021-32658, GHSA-g5gf-rmhm-wpxw

## What is CVE-2021-32658?

CVE-2021-32658 is a medium-severity vulnerability in nextcloud security-advisories, published on 8 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Nextcloud Android is the Android client for the Nextcloud open source home cloud system. Due to a timeout issue the Android client may not properly clean all sensitive data on account removal. This could include sensitive key material such as the End-to-End encryption keys. It is recommended that the Nextcloud Android App is upgraded to 3.16.1

Weakness: CWE-212 (Improper Removal of Sensitive Information Before Storage or Transfer), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2021-32658?

1 open source package ship an affected version, including nextcloud. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `nextcloud` | Bitnami | All versions | 3.16.1 |

Products: Nextcloud Nextcloud.

## How do I fix CVE-2021-32658?

Upgrade nextcloud to 3.16.1 or later.

## Is CVE-2021-32658 being exploited?

There is no known exploitation of CVE-2021-32658 in the wild and no public exploit code.

## Other vulnerabilities in nextcloud security-advisories

- [CVE-2019-5454](https://insights.sbomify.com/CVE-2019-5454/): SQL injection in com.nextcloud.client (critical 9.8)
- [CVE-2021-43863](https://insights.sbomify.com/CVE-2021-43863/): SQL Injection in FileContentProvider (GHSL-2021-1007) (high 7.5)
- [CVE-2019-5450](https://insights.sbomify.com/CVE-2019-5450/): Cross-site scripting in com.nextcloud.client (medium 6.8)
- [CVE-2019-5455](https://insights.sbomify.com/CVE-2019-5455/): Auth bypass in com.nextcloud.client (medium 6.8)
- [CVE-2021-22905](https://insights.sbomify.com/CVE-2021-22905/): Information disclosure in Nextcloud Android App (com.nextcloud.client) (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-32658 and fix it if it is affected.

What it is: CVE-2021-32658 is a medium-severity vulnerability in nextcloud security-advisories, published on 8 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-32658 in the wild and no public exploit code.

Affected packages and fixed versions:
- nextcloud (Bitnami): affected all versions; fixed in 3.16.1

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-2021-32658/ (Markdown: https://insights.sbomify.com/CVE-2021-32658/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-32658
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-32658
- OSV: https://osv.dev/vulnerability/CVE-2021-32658

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-32658/
Summaries are generated and may contain mistakes; the official description above is the record.