# CVE-2025-34320: BASIS BBj < 25.00 Unauthenticated Arbitrary File Read RCE

> Unauthenticated attackers can read arbitrary files via path traversal, potentially stealing credentials to achieve remote code execution on BASIS BBj servers.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Nov 2025
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-gfrw-rq64-cvg9

## What is CVE-2025-34320?

CVE-2025-34320 is a critical path traversal vulnerability in BASIS BBj, published on 20 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

BASIS BBj versions prior to 25.00 contain a Jetty-served web endpoint that fails to properly validate or canonicalize input path segments. This allows unauthenticated directory traversal sequences to cause the server to read arbitrary system files accessible to the account running the service. Retrieved configuration artifacts may contain account credentials used for BBj Enterprise Manager; possession of these credentials enables administrative access and use of legitimate management functionality that can result in execution of system commands under the service account. Depending on the operating system and the privileges of the BBj service account, this issue may also allow access to other sensitive files on the host, including operating system or application data, potentially exposing additional confidential information.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2025-34320?


## How do I fix CVE-2025-34320?

No fix has been published for CVE-2025-34320 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34320 being exploited?

There is no known exploitation of CVE-2025-34320 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34320 and fix it if it is affected.

What it is: CVE-2025-34320 is a critical path traversal vulnerability in BASIS BBj, published on 20 Nov 2025. 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-2025-34320 in the wild and no public exploit code.

Affected product: BASIS BBj. 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-2025-34320/ (Markdown: https://insights.sbomify.com/CVE-2025-34320/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34320
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34320
- OSV: https://osv.dev/vulnerability/CVE-2025-34320

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34320/
Summaries are generated and may contain mistakes; the official description above is the record.