Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied, it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. If used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in sinatrateam Sinatra allows Stored XSS.This issue affects Sinatra: from n/a through 1.3.

Sinatra is a domain-specific language for creating web applications in Ruby. An issue was discovered in Sinatra 2.0 before 2.2.3 and 3.0 before 3.0.4. An application is vulnerable to a reflected file download (RFD) attack that sets the Content-Disposition header of a response when the filename is derived from user-supplied input. Version 2.2.3 and 3.0.4 contain patches for this issue.

Sinatra before 2.2.0 does not validate that the expanded path matches public_dir when serving static files.

Jenkins Chef Sinatra Plugin 1.20 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

A missing permission check in Jenkins Chef Sinatra Plugin 1.20 and earlier allows attackers with Overall/Read permission to have Jenkins send an HTTP request to an attacker-controlled URL and have it parse an XML response.

A cross-site request forgery (CSRF) vulnerability in Jenkins Chef Sinatra Plugin 1.20 and earlier allows attackers to have Jenkins send an HTTP request to an attacker-controlled URL and have it parse an XML response.

A cross-site request forgery vulnerability in Jenkins Chef Sinatra Plugin in the ChefBuilderConfiguration.DescriptorImpl#doTestConnection form validation method allows attackers to initiate a connection to an attacker-specified server.

A missing permission check in Jenkins Chef Sinatra Plugin in the ChefBuilderConfiguration.DescriptorImpl#doTestConnection form validation method allows attackers with Overall/Read permission to initiate a connection to an attacker-specified server.

Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.