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Discovered almost 5 years ago
Source: static code analysis
Category: File Access
Confidence level: Medium

Problem

Model attribute used in file name

Location

app/models/emoji.rb:73

File.open("#{Emoji.base_directory}/#{name}#{File.extname(file.original_filename)}", "wb")

Category description: When user-supplied input can contain ".." or similar characters that are passed through to file access APIs, causing access to files outside of an intended subdirectory.

Solution: fix the issue in app/models/emoji.rb or mark it as false positive.