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!This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

CoSign Single Signon

Alternative authentication plugin for WordPress. This plugin add several login method: LDAP login and two Single Sign-on(SSO) login method: CoSign V2,


The settings for CoSign SSO are extremely simple. But before you change the login method to 'SSO' or 'LDAP', you mast check options for cosign and ldap carefully. Wrong configrations will ban all users including yourself!

If you cannot login any more, don't blame me. A trick may help you:

$ touch <PLUGIN_DIR>/cosign-sso/FALLBACK

If the fallback file contains "ldap", "cosign2", or "cosign3", it will fallback to the right login method.

After you correct the settings, not forgot to remove the FALLBACK file.

Notes for CoSign 3.x:

  • CoSign 3.x filter needs to add a "/cosign/valid" location as cosign handler.
  • If wordpress uses a permlink, which means the RewriteRule in .htaccess may conflict with the "/cosign/valid" handler.
  • You can hack wp-includes/rewrite.php, add "RewriteRule ^cosign/valid - [L]" right after "RewriteBase" directive.


This section describes how to localized, which means let cosign-sso speak in your language.

  • POT file : cosign-sso/languages/cosign_sso.pot
  • Copy pot file to your locale, such as cosign-sso/languages/cosign_sso-zh_CN.pot for Chinese.
  • Translate it using your favorate editor. lokalize and kbabel are recommended.
  • Convert po to mo using command:
      $ cd plugins/cosign-sso/languages
      $ msgfmt cosign_sso-zh_CN.po -o cosign_sso-zh_CN.mo

Known Issues

No known issues at this time.

If you find any bugs or want to request some additional features for future releases, please log them on the wordpress project of homepage for our interest projects

Requires: unknown or higher
Compatible up to: 2.9.2
Last Updated: 7 years ago
Active Installs: 40+


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