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[MAJOR] Users logging in as other users!

Discussion in 'Troubleshooting and Problems' started by Zaino60, Nov 7, 2015.

  1. Zaino60

    Zaino60 Member

    Hello Xenforo community,
    Lately I have been experiencing a weird MAJOR bug at my forums (http://www.happy-hg.com/forum/) in where RANDOMLY there is a very low chance of an user when logging in to it's account, to be logged with someone else's account instead of theirs. I have no idea what are the steps to reproduce this bug as it's completely random and it can happen with any account logged in from any user.
    Furthermore, I have checked my errors log and I found two errors from some days ago, I have no idea if these errors have anything to do with this bug but I'll paste them here anyway: http://pastebin.com/rJbr8tRT
    Xenforo Version: 1.5.0
    Please Help!
  2. Brogan

    Brogan XenForo Moderator Staff Member

    I have moved this from bug reports to troubleshooting.
    If it was a bug we would have had more reports of it.

    Does it happen with all add-ons disabled?
    Zaino60 likes this.
  3. Zaino60

    Zaino60 Member

    I only have 3 small add-ons, I'll try disabling them and reply back if it kept happening.
    By the way, Apparently this happens later, when someone logs in it logs him/her normally to it's account but when they refresh the page they find themselves randomly logged in as another account, really weird...
  4. Brogan

    Brogan XenForo Moderator Staff Member

    Do you have any caching implemented?
  5. Zaino60

    Zaino60 Member

    How do I check that?
  6. Mike

    Mike XenForo Developer Staff Member

    This is likely caching on the server level, such as with Varnish. I would contact your host to see if they are doing anything like that. XenForo specifically sends headers to prevent caching like that but it sounds it's being disregarded.

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