- Steps to reproduce the issueTenant subdomain logout is not working. Tenant stays logged in always:
116 Answer(s)
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- In ABP Framework, especially in multi-tenant subdomain scenarios, logout issues can occur if the session or authentication cookies are not properly invalidated across subdomains. This can result in users remaining logged in even after attempting to log out.
To address this, ensure the following in your solution:
- Cookie Domain Configuration
Set the authentication cookie domain to a common parent domain (e.g.,.yourdomain.com) so that cookies are shared and invalidated across all subdomains (including tenant subdomains).
In your AuthServer and MVC projects, configure the cookie options:
services.ConfigureApplicationCookie(options => { options.Cookie.Domain = ".yourdomain.com"; // Use your actual domain });Logout Endpoint and Session Termination
Ensure that the logout endpoint invalidates the authentication session and removes cookies both on the server and client side.
ABP's default logout may not always clear cookies for all subdomains. You may need to explicitly clear cookies with the correct domain and path.Cross-Subdomain Logout
If you are using OpenIddict or IdentityServer, ensure thepost_logout_redirect_uriand allowed logout URLs are correctly set for all subdomains in your client configuration.Known Issue
There is a known issue in ABP regarding insufficient session termination on logout, which can cause the session to persist:- See: ABP Penetration Test Report: Insufficient Session Termination
- Track status: [GitHub Issue #19576](https://github.com/abpframework/abp/issues/19576)
Browser Cache and Cookie Path
Make sure the browser is not caching authentication state and that the cookie path is set to/to cover all routes.Testing
After making these changes, clear your browser cookies and test logout from different subdomains to ensure the session is properly terminated.
Sources:
- ABP Penetration Test Report: Insufficient Session Termination
- GitHub Issue: Insufficient Session Termination
- ABP Blazor Multi-Tenant Subdomain Resolution
This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.
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Cross-Subdomain Logout If you are using OpenIddict or IdentityServer, ensure the post_logout_redirect_uri and allowed logout URLs are correctly set for all subdomains in your client configuration. ?
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Tenant subdomain login is not showing login screen, logging in automatically. Logout is not working as well
This issue is seen in 9.2.3 version. It worked fine in 9.0.4 version
Without tenant subdomain, login and logout working fine
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hi
Can you share some screenshots and all the website's debug logs?
https://abp.io/support/questions/8622/How-to-enable-Debug-logs-for-troubleshoot-problems
liming.ma@volosoft.com Thanks.
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yes.. working on this
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It worked only first time when I try to login to tenant it asks for user name /pwd. Logout did not work. When trying to Logout from tenant, getting error: ** [Error] SessionId is null. It's not possible to revoke the session during sign out.**
Host user can login/ logout fine Only Tenant user logout has issue.
We use OpenIdDict, tenantsubdomain
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hi
Can you share some screenshots and all the website's debug logs?
https://abp.io/support/questions/8622/How-to-enable-Debug-logs-for-troubleshoot-problems
liming.ma@volosoft.com Thanks.
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sending you the file. Please let me know if you could get it.
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hi
You shared the
harfile. Can you also share the debug logs? see https://abp.io/support/questions/8622/How-to-enable-Debug-logs-for-troubleshoot-problemsThanks.
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Try now, weblogs are shared. Thank you, Sudha
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do you need other logs ?
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hi
The error is
AmbiguousMatchException: he request matched multiple endpointsCan you share the code of
CustomLogoutpage?Thanks.
2025-08-01 14:06:22.116 -05:00 [INF] Request starting HTTP/2 GET https://cpattest.auth.cpat.com:44346/CustomLogout - null null 2025-08-01 14:06:22.162 -05:00 [ERR] An unhandled exception has occurred while executing the request. Microsoft.AspNetCore.Routing.Matching.AmbiguousMatchException: The request matched multiple endpoints. Matches: TMS_MVC.Web.Controllers.AccountController.LoginAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.LogoutAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.Logout (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.AccessDeniedAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.ChallengeAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.FrontChannelLogoutAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.ImpersonateUserAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.DelegatedImpersonateAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.BackToImpersonatorAsync (TMS_MVC.Web) TMS_MVC.Web.Controllers.AccountController.ImpersonateTenantAsync (TMS_MVC.Web) at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.ReportAmbiguity(Span`1 candidateState) at 2025-08-01 14:06:22.199 -05:00 [INF] Request finished HTTP/2 GET https://cpattest.auth.cpat.com:44346/CustomLogout - 500 null text/html; charset=utf-8 83.1091msMarkdown supported.Copy, paste, or drag & drop images and files (max 100 MB per file, 100 MB total per post) -
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oh that code, I deleted it. Let me clean logs and resend you.
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ok, reproduce the error and share logs.txt again.
Remember to set the log level to debug
https://abp.io/support/questions/8622/How-to-enable-Debug-logs-for-troubleshoot-problems
Thanks.
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I changed log like below: Log.Logger = new LoggerConfiguration() .MinimumLevel.Debug() .MinimumLevel.Override("Microsoft.EntityFrameworkCore", LogEventLevel.Warning) .MinimumLevel.Override("OpenIddict", LogEventLevel.Verbose) .Enrich.FromLogContext() .WriteTo.Async(c => c.File("Logs/logs.txt")) .WriteTo.Async(c => c.Console()) .CreateBootstrapLogger(); You got new file
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sent you auth server logs. Will send you api logs as well
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hi
When trying to Logout from tenant, getting error:
Is there anything else other than this error log?
Does it break any functionality?
Thanks.
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We have subdomain tenant. When I logout from tenant, it is not working. Tenant stayes logged in always.
Thats when we saw this error "SessionId is null. It's not possible to revoke the session during sign out."
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create Tenant -> Login -> Login screen comes up -> I login all good Logout this tenant -> Does not work i.e. next time try to login, it is already logged in.It does not ask for user name/password
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This code is not deployed yet. We are using 9.0.4 volo version and it is working fine. We need to fix this issue to deploy the project using 9.2.3. https://dev.appraoch.cpat.dev (Working with 9.0.4)
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How can I revoke session logic from the project ?
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hi
Your current error is unrelated to the session.
I think it's about the subdomain and cookies.
Can you publish it online temporarily? After I've checked, you can stop it.
Or how can I reproduce it in my local?
Thanks.
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Let me try to publish tomorrow. Now my team is offline. I will ping you tomorrow after I can publish it.
I do not know if you can duplicate with the sample, You can try as well. we have subdomain tenant. Login to tenant and cannot logout from tenant. for example: cpattest.dev.approach.cpat.dev-> login -> we ask for user name/pwd ->logout->next time from landing page try to login-> it is always logged in. It will not ask for user name/pwd. if you login to host->logout and login again working fine.
What are the areas, I need to debug ? Should I change any code in Auth server ?
Thank you, Sudha
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