BASIS International BBj up to 24.x BBj Service path traversal

Summaryinfo

A vulnerability was found in BASIS International BBj up to 24.x. It has been rated as critical. This impacts an unknown function of the component BBj Service. This manipulation causes path traversal. This vulnerability is tracked as CVE-2025-34320. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in BASIS International BBj up to 24.x and classified as very critical. Affected by this vulnerability is an unknown function of the component BBj Service. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed by Victor A. Morales. It is possible to read the advisory at myemail.constantcontact.com. This vulnerability is known as CVE-2025-34320 since 04/15/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/20/2025). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 25.00 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-198301). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• BASIS International

Name

• BBj

Version

• 24.x

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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