Over the years, I often realize that I lose track of challenges that are down. Since, I haven't found a current list of them in the forum, I decided to start one. Don't hesitate to contribute to the list! I also hope, some day, this list will be a nice starting point for admins.

Confirmed down by user who previously solved them

• Exploit 3 - The strange link (confirmed by Kad on 2016-08-22)
• Programming 6 - Just another calculation (confirmed by livinskull on 2016-08-22)
• Exploit 26: Lose Lip5 (confirmed by S0410N3 on 2017-05-04)
• Exploit 17 - RHC6 (confirmed by S0410N3 on 2018-02-05)
• Information Gathering 5 - Cure Sheep (confirmed by matrixman on 2018-04-28)

Challenges pending confirmation of their status

• CrackIt 3 - It's starting(brought up by destiny on 2017-06-05)
• Exploit 9 - Analyze this II!(brought up by destiny on 2017-06-05)

Challenges confirmed working

• Stegano 56 - Footprints 2 (confirmed by Erik on 2017-04-18)
• Javascript 2 - Often used, but easy to solve (confirmed by kjangwa on 2017-04-17)
• Javascript 5 - Easy script (confirmed by kjangwa on 2017-04-17)
• Exploit 8 - The Guestbook (confirmed by Kad on 2017-04-11)

-Kad

Dear Kad,

thank you very much - this is a brilliant idea! In fact I do not have an overview of what the problems and their impact are.

Someone wrote to me that JavaScript2 is broken - can anyone confirm that?

Best wishes,
Erik

Eric, yes, it is down

BTW, great to have you back

You can also add Footprints 2 by BaRa in steganography.

http://bright-shadows.net/challenges/stegano/BaRa_FP2/index.php

Thanks r0d and S0410N3; I updated the original post!

- Kad

Hello,

what about The Guestbook? I think it should work. Could someone please confirm this?

Thank you,
Erik

It does! Your question motivated me to solve it. Solved it, after all those years!

-Kad

The two ReverseMes are tendencially obsolete (the solution is defined by Windows XP) and haven't been validated for a while (or have they?).
Not sure if you can call them "down".
But I solved bb's one in 2012

Cure Sheep in Information Gathering is down too.

Hello,

I just fixed JavaScript 1 (yes, even that one was broken ), and the underlying issue most likely has affected many other challenges. So I hope some of those listed above might be fixed now as well - anyone willing to check?

Best wishes,
Erik