An issue was discovered in in TortoiseSVN 1.12.1. The Tsvncmd: URI handler allows a customised diff operation on Excel workbooks, which could be used to open remote workbooks without protection from macro security settings to execute arbitrary code. A tsvncmd:command:diff?path:[file1]?path2:[file2] URI will execute a customised diff on [file1] and [file2] based on the file extension. For xls files, it will execute the script diff-xls.js using wscript, which will open the two files for analysis without any macro security warning. An attacker can exploit this by putting a macro virus in a network drive, and force the victim to open the workbooks and execute the macro inside.

Directory traversal vulnerability in Subversion before 1.4.5, as used by TortoiseSVN before 1.4.5 and possibly other products, when run on Windows-based systems, allows remote authenticated users to overwrite and create arbitrary files via a ..\ (dot dot backslash) sequence in the filename, as stored in the file repository.