TY - CHAP A1 - van Aerssen, Max A1 - Leich, Christian A1 - Schmidt, Holger A1 - Al Ali, Salar A1 - Benni, Abdulkader A1 - Tanz, Jakob T1 - CopypastaVulGuard - A browser extension to prevent copy and paste spreading of vulnerable source code in forum posts T2 - ARES '22: Proceedings of the 17th International Conference on Availability, Reliability and Security N2 - Forums such as Stack Overflow are used by many software developers to find a solution for a given coding problem. Found solutions, i.e. forum posts containing relevant source code, are utilized in a copy and paste manner. This behavior carries the risk that vulnerabilities contained in the source code of the forum posts are spread. Software developers should be able to identify vulnerable source code at an early stage, thereby preventing copying the corresponding source code. In this paper, we introduce the tool CopypastaVulGuard that identifies vulnerable source code in forum posts and allows software developers to omit the source code by marking the forum posts as dangerous. Our tool consists of a browser extension and a management application capable to address as examples SQL injections, remote code executions and deprecated functions based on a dump of the archive.org Stack Overflow data set. We present an evaluation of our tool's possible impact and relevance considering pros/cons and selected research questions. Y1 - 2022 U6 - https://doi.org/10.1145/3538969.3538973 SP - 1 EP - 8 PB - Association for Computing Machinery CY - New York ER -