# CVE-2023-52947: Missing authorization in Synology Active Backup for Business Agent

> Local users can bypass authentication to log out the Synology Active Backup for Business Agent, potentially disrupting session management without affecting backup operations.

- **Severity:** Medium 4.0 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Sep 2024
- **Updated:** 26 Sep 2024
- **Also known as:** GHSA-56mf-38rx-qwp9

## What is CVE-2023-52947?

CVE-2023-52947 is a medium-severity missing authorization vulnerability in Synology Active Backup for Business Agent, published on 26 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Missing authentication for critical function vulnerability in logout functionality in Synology Active Backup for Business Agent before 2.6.3-3101 allows local users to logout the client via unspecified vectors. The backup functionality will continue to operate and will not be affected by the logout.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2023-52947?

It affects 1 product.


Products: Synology Active Backup for Business Agent.

## How do I fix CVE-2023-52947?

No fix has been published for CVE-2023-52947 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-52947 being exploited?

There is no known exploitation of CVE-2023-52947 in the wild and no public exploit code.

## Other vulnerabilities in Synology Active Backup for Business Agent

- [CVE-2024-47265](https://insights.sbomify.com/CVE-2024-47265/): Path traversal in Active Backup for Business (medium 6.5)
- [CVE-2025-66592](https://insights.sbomify.com/CVE-2025-66592/): Path traversal in Synology Active Backup for Business Agent (medium 6.1)
- [CVE-2023-52949](https://insights.sbomify.com/CVE-2023-52949/): Missing authorization in Synology Active Backup for Business Agent (medium 5.5)
- [CVE-2023-52950](https://insights.sbomify.com/CVE-2023-52950/): Information disclosure in Synology Active Backup for Business Agent (medium 5.3)
- [CVE-2023-52948](https://insights.sbomify.com/CVE-2023-52948/): Information disclosure in Synology Active Backup for Business Agent (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-52947 and fix it if it is affected.

What it is: CVE-2023-52947 is a medium-severity missing authorization vulnerability in Synology Active Backup for Business Agent, published on 26 Sep 2024. 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-2023-52947 in the wild and no public exploit code.

Affected product: Synology Active Backup for Business Agent. 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-2023-52947/ (Markdown: https://insights.sbomify.com/CVE-2023-52947/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-52947
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-52947
- OSV: https://osv.dev/vulnerability/CVE-2023-52947

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-52947/
Summaries are generated and may contain mistakes; the official description above is the record.