Title: Potential security issue?
Last modified: August 18, 2016

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# Potential security issue?

 *  [mattiouz](https://wordpress.org/support/users/mattiouz/)
 * (@mattiouz)
 * [18 years, 7 months ago](https://wordpress.org/support/topic/potential-security-issue/)
 * I upgraded my wordpress to verion 2.3.1 a few days ago. Right after the upgrade
   everything was working fine.
 * Now I get an error on my blog:
    “Fatal error: Call to undefined function: add_action()
   in /web/www/blog/wp-includes/classes.php on line 307”
 * It seems that a bunch of files have been modified recently so I wonder if this
   can be due to a security issue.
    Here is the list of file that have been touched(
   I haven’t modified any of them manually): -rw-r–r– 1 www-data www-data 188 2007-
   11-05 07:06 blog/index.php -rw-r–r– 1 www-data www-data 33998 2007-11-08 10:57
   blog/wp-includes/general-template.php -rw-r–r– 1 www-data www-data 11388 2007-
   11-01 11:40 blog/wp-includes/gettext.php -rw-r–r– 1 www-data www-data 11798 2007-
   11-01 11:40 blog/wp-includes/wp-db.php -rw-r–r– 1 www-data www-data 22847 2007-
   11-01 11:40 blog/wp-includes/pluggable.php -rw-r–r– 1 www-data www-data 6208 
   2007-11-01 11:40 blog/wp-includes/default-filters.php -rw-r–r– 1 www-data www-
   data 23730 2007-11-08 08:58 blog/wp-includes/classes.php -rw-r–r– 1 www-data 
   www-data 110627 2007-11-01 11:40 blog/wp-includes/endix.php -rw-r–r– 1 www-data
   www-data 17193 2007-11-08 10:57 blog/wp-includes/class-mail.php -rw-r–r– 1 www-
   data www-data 3315 2007-11-01 11:40 blog/wp-admin/admin.php -rw-r–r– 1 www-data
   www-data 5311 2007-11-01 11:40 blog/wp-admin/index.php -rw-r–r– 1 www-data www-
   data 58079 2007-11-01 11:40 blog/xmlrpc.php -rw-r–r– 1 www-data www-data 617 
   2007-11-01 11:43 blog/wp-content/themes/random-image/footer.php
 * I installed wordpress on 2007-10-29 in the blog/ directory. I have another instance
   of wordpress running on the same server (in a different directory) but all its
   files date from the day I updated them. None of the files in the second blog 
   have been modified.
 * Any help or comment would be wlcome to understand how this happened.
 * Thanks,
    Matthieu

Viewing 1 replies (of 1 total)

 *  [Jeremy Clark](https://wordpress.org/support/users/jeremyclark13/)
 * (@jeremyclark13)
 * [18 years, 7 months ago](https://wordpress.org/support/topic/potential-security-issue/#post-650042)
 * If you left your directory world writable then it’s not a security issue with
   wordpress but poor security on your part. Have a look here to see what it should
   be.
 * [http://codex.wordpress.org/Changing_File_Permissions](http://codex.wordpress.org/Changing_File_Permissions)
 * Other good security guidelines
    [http://codex.wordpress.org/Hardening_WordPress](http://codex.wordpress.org/Hardening_WordPress)

Viewing 1 replies (of 1 total)

The topic ‘Potential security issue?’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [Jeremy Clark](https://wordpress.org/support/users/jeremyclark13/)
 * Last activity: [18 years, 7 months ago](https://wordpress.org/support/topic/potential-security-issue/#post-650042)
 * Status: not resolved

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