Apprise is an open source library which allows you to send a notification to almost all of the most popular notification services available. Prior to 1.11.0, Apprise HTTP-based notification plugins and HTTP attachment and config loaders in apprise/attachment/http.py and apprise/config/http.py follow HTTP redirects by default and resend user-configured auth headers and query parameters on the redirected request, allowing a compromised trusted destination or on-path attacker to receive secrets such as Authorization headers, bearer tokens, custom headers, and service keys. This issue is fixed in version 1.11.0.
Exploitability
AV:NAC:HPR:NUI:RScope
S:UImpact
C:LI:NA:N3.1/CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:NInformation Disclosure
Input Validation