CVE-2023-41900: Debian Linux

Medium severity, CVSS 4.3. EPSS: 0.9% chance of exploitation in the next 30 days.

Jetty is a Java based web server and servlet engine. Versions 9.4.21 through 9.4.51, 10.0.15, and 11.0.15 are vulnerable to weak authentication. If a Jetty `OpenIdAuthenticator` uses the optional nested `LoginService`, and that `LoginService` decides to revoke an already authenticated user, then the current request will still treat the user as authenticated. The authentication is then cleared from the session and subsequent requests will not be treated as authenticated. So a request on a previously authenticated session could be allowed to bypass authentication after it had been rejected by the `LoginService`. This impacts usages of the jetty-openid which have configured a nested `LoginService` and where that `LoginService` will is capable of rejecting previously authenticated users. Versions 9.4.52, 10.0.16, and 11.0.16 have a patch for this issue.

Affected products

• Debian Debian Linux: version 11.0 only; version 12.0 only
• Eclipse Jetty: from 9.4.21, before 9.4.52 (fixed in 9.4.52); from 10.0.0, before 10.0.16 (fixed in 10.0.16); from 11.0.0, before 11.0.16 (fixed in 11.0.16)

Published 2023-09-15. Last modified 2026-06-17.