usd-2018-0015 | Lexware Professional 2017/17.02

Advisory ID: usd-2018-0015
CVE Number: N/A
Affected Product: Lexware Professional 2017
Affected Version: 17.02
Vulnerability Type: Improper/Missing Access Control
Security Risk: Critical
Vendor URL:
Vendor Status: Fixed


The vulnerability considered here, is the lack of access control on individual users access rights within the database. Once the database is made accessible with the user credentials, irrespective of the privilege level of the user, it is possible to alter data, which should have been otherwise forbidden or hindered. The vulnerability, by design, has serious implications since this allows any user with access to database to alter crucial contents, for example, properties of other users such as name and the group id. This has a broad spectrum of potential impacts, ranging from changing a user’s description to changing the group id and properties. This indicates an easily available method to grant higher privileges to self or alternatively to lower the privileges of an admin level user.



This security vulnerabilities were found by Sebastian Puttkammer of usd AG.


In order to protect businesses against hackers and criminals, we always have to keep our skills and knowledge up to date. Thus, security research is just as important for our work as is building up a security community to promote the exchange of knowledge. After all, more security can only be achieved if many individuals take on the task.

Our CST Academy and our usd HeroLab are essential parts of our security mission. We share the knowledge we gain in our practical work and our research through training courses and publications. In this context, the usd HeroLab publishes a series of papers on new vulnerabilities and current security issues.

Always for the sake of our mission: „more security.“

to usd AG

In accordance with usd AG’s Responsible Disclosure Policy, all vendors have been notified of the existence of these vulnerabilities.


The information provided in this security advisory is provided „as is“ and without warranty of any kind. Details of this security advisory may be updated in order to provide as accurate information as possible.