Where to store OAuth 2.0 client id and secret?

This depends on what is it that you are developing. If it is a plugin, you have to store such settings in options as the last thing site owner should be asked to do is to modify their config file.

If it is your own site, just make it a constant that is declared in your code if you do not want it to be configurable by the admin. There is no advantage in keeping it in some non obvious place which is harder to find when inspecting the code.

As for security, in theory having it in the code is more secure, as you do not have to worry about someone hacking into the DB, but in practice, since if someone can get into your DB you are already toast (he will add its own admin user…), it makes almost zero difference. (the only difference I can think of is getting a dump of the DB, but this kind of hack is still hard and probably super rare)

Related Posts:

  1. Is moving wp-config outside the web root really beneficial?
  2. Prevent access or auto-delete readme.html, license.txt, wp-config-sample.php
  3. Generate WordPress salt
  4. Garbage in beginning of wp-config.php – was this WP installation compromised?
  5. How do I authenticate WP users from a chrome extension?
  6. How does the “authentication unique keys and salts” feature work?
  7. Securing wp-config leads to sensitive information leak on wp-settings
  8. Is there any point setting the keys and salts in wp-config.php?
  9. What’s the point of forbidding access to wp-config.php?
  10. Config file with no Keys..?
  11. White screen of death on admin pages after moving wp-config up two levels for security
  12. Storing FTP details in wp-config.php
  13. My Site keeps crashing due to the wp-confg file being deleted
  14. Moving wp-config.php outside root folder where we have multiple wordpress websites for enhanced security [duplicate]
  15. How to change location of wp-config.php to folder or 2 folders up?
  16. Adding Security Keys?
  17. Remove hacked code – out of ideas! [closed]
  18. Secret keys in SCM
  19. wp-config.php moved above root results in no plugin updates
  20. wp-config.php file and code injection
  21. Malware/Permission bug removal?
  22. Default installation permissions for wp-config.php
  23. Move data from wp-config to another file
  24. SSL Error: unable to get local issuer certificate
  25. What is an Endpoint?
  26. When you use ‘badidea’ or ‘thisisunsafe’ to bypass a Chrome certificate/HSTS error, does it only apply for the current site? [closed]
  27. When you use ‘badidea’ or ‘thisisunsafe’ to bypass a Chrome certificate/HSTS error, does it only apply for the current site? [closed]
  28. How to redirect all HTTP requests to HTTPS
  29. What is the difference between a cer, pvk, and pfx file?
  30. How to solve “Kernel panic – not syncing – Attempted to kill init” — without erasing any user data
  31. What’s the best approach for generating a new API key?
  32. Constructing requests with URL Query String in Python
  33. Is it possible to decrypt SHA1
  34. Simplest two-way encryption using PHP
  35. Why does the URL http://a/%%30%30 crash Google Chrome?
  36. what is a auth_user_file.txt?
  37. When you use ‘badidea’ or ‘thisisunsafe’ to bypass a Chrome certificate/HSTS error, does it only apply for the current site?
  38. How does the SQL injection from the “Bobby Tables” XKCD comic work?
  39. Error `sec_error_revoked_certificate` when viewed in Firefox only
  40. How to view PHP on live site
  41. Convert .pfx to .cer
  42. how fix “this certificate cannot be verified up to a trusted certification authority”
  43. Can an attacker use inspect element harmfully?
  44. Where does Internet Explorer store saved passwords?
  45. How can bcrypt have built-in salts?
  46. Hide the fact a site is using WordPress?
  47. Verifying that I have fully removed a WordPress hack?
  48. Infected Files – what to do [closed]
  49. What security concerns should I have when setting FS_METHOD to “direct” in wp-config?
  50. Getting a List of Currently Available Roles on a WordPress Site?
  51. WordPress 4.7.1 REST API still exposing users
  52. Can I Prevent Enumeration of Usernames?
  53. Best way to eliminate xmlrpc.php?
  54. What’s the easiest way to stop WP from ever logging me out
  55. How to store username and password to API in wordpress option DB?
  56. If a hacker changed the blog_charset to UTF-7 does that make WordPress vulnerable to further attacks?
  57. Should I escape wordpress functions like the_title, the_excerpt, the_content
  58. Why should I use the esc_url?
  59. Should I remove install.php and install-helper.php?
  60. How safe / sanitized is wp_insert_posts()?
  61. Why does WordPress need my private ssh key to update?
  62. When to use esc_html and when to use sanitize_text_field?
  63. From a security standpoint, should bloginfo() or get_bloginfo() be escaped?
  64. Where to securely store API keys and passwords in WordPress?
  65. Are Nonces Useless?
  66. What could a hacker do with my wp-config.php
  67. What is the difference between esc_html filter vs attribute_escape filter?
  68. Why escape if the_content isnt?
  69. Why does WordPress have more than one salt?
  70. Why are passwords exportable as plain text in WordPress?
  71. What is the ideal setup to address security concerns?
  72. Will there be security updates for 3.1 once 3.2 is released?
  73. What’s the difference between esc_* functions?
  74. Full path disclosure on rss-functions.php
  75. What to use instead of wp_kses() in user output
  76. How to set up fail2ban with WordFence?
  77. How do I technically prove that WordPress is secure?
  78. Are the default salts secure?
  79. is_email() VS sanitize_email()
  80. WordPress it’s cleaning a custom query_var to avoid sql injections?
  81. Which KSES should be used and when?
  82. Can someone explain the use cases of esc_html?
  83. Is there a way to force ssl on certain pages
  84. How do WordPress Nonces Work?
  85. What is the best way to get directory path for wp-config.php?
  86. Tips for finding SPAM links injected into the_content
  87. Subscribe to email for security fixes?
  88. Close a wordpress blog – keep site as it is but prevent hacks
  89. Is WordPress vulnerable to the httpoxy?
  90. What is the purpose of having a token in cookies?
  91. How to escape custom css?
  92. How to remove “Connection Information” requirement on localhost install of WP on MACOSX
  93. Understanding SVG vulnerabilities in WordPress related to a specific fix
  94. How is password strength calculated?
  95. Moving wp-config.php: Can this be done after site launch?
  96. How to secure or disable the RSS feeds?
  97. Regular security checks – what steps should be included?
  98. What are the pros and cons of using a custom front-end to retrieve content from a WordPress back-end
  99. How can I easily verify a core or plugin update has not broken anything?
  100. Disable comment windows for all existing posts (pages/blogposts)
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)