Improper Link Resolution Before File Access ('Link Following')
The Show In Browser (show_in_browser) gem through 0.0.3 for Ruby allows local users to inject arbitrary web script or HTML via a symlink attack on "/tmp/browser.html."
CWE-59 - Improper Link Resolution Before File Access
'Improper link resolution before file access' occurs when software accesses a file resource but fails to verify that the file isn't a link or shortcut to another file. An attacker can potentially gain access to arbitrary files and from there the impact can vary, depending on the application, from sensitive data exposure to remote code execution.