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.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-34320 being exploited?
There is no known exploitation of CVE-2025-34320 in the wild and no public exploit code.
Sources
Also known as GHSA-gfrw-rq64-cvg9.