Advisories for Composer/Yourls/Yourls package

YOURLS stores the HTTP Referer header for short URL redirects and later renders aggregated referrer domains in the per-link statistics page. An unauthenticated attacker can send a crafted Referer header to any existing short URL. When an authenticated administrator or stats-page viewer opens that short URL's statistics page, the crafted referrer is embedded into Google Charts JavaScript without JavaScript-string escaping, causing stored cross-site scripting. This is reachable in default private …

The callback and jsonp request parameters are directly concatenated into the response without any sanitization that allowing attackers to inject arbitrary JS code. When YOURLS_PRIVATE is set to false (public API mode), this vulnerability can be exploited by any unauthenticated attacker. In private mode, the XSS payload is still injected into the 403 response body though browser execution is blocked.

YOURLS versions 1.8.2 and prior are vulnerable to Cross-Site Request Forgery.

yourls is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

yourls is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

yourls is vulnerable to Improper Restriction of Rendered UI Layers or Frames

Multiple Stored Cross Site Scripting (XSS) vulnerabilities exist in the YOURLS Admin Panel - An authenticated user must modify a PHP plugin with a malicious payload and upload it, resulting in multiple stored XSS issues.

YOURLS through 1.7.3 is affected by a type juggling vulnerability in the API component that can result in login bypass.