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Bug [Solved] Nonce is invalid error in v7.6.47 with cloudflare

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Last Post by Asti 3 months ago

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sunmed

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Mar 14, 2026 4:04 pm

(@sunmed)

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Joined: 3 months ago

[#11342]

Hello,

Since I updated to version 7.6.47, my readers can no longer post comments; they receive a "nonce is invalid" error. i have cloudflare + APO cloudflare

I don't have this problem when I bypass Cloudflare by hardcoding my server's IP address in the hosts file.

The only solution I found was to roll back to version 7.6.46, and that resolved the issue temporarly. Readers were complaining about no longer being able to comment on articles.

I'm waiting for a solution in a future plugin update. The problem is the same after cleaning all cache. Only rollback in 7.6.46 is ok for the moment.

Thanks

This topic was modified 3 months ago by sunmed

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sunmed

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Mar 14, 2026 4:10 pm

(@sunmed)

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for precision:

Since updating to wpDiscuz 7.6.47 (March 11, 2026), visitors receive a "nonce is invalid" error when submitting comments. Reverting to the previous version immediately resolves the issue. The site is hosted behind Cloudflare, but the behavior is directly related to the 7.6.47 update. Please investigate whether there is a regression related to nonce validation/AJAX calls. Maybe

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Asti

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(@asti)

Joined: 8 years ago

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Posts: 8300

Mar 16, 2026 3:00 pm

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sunmed

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@sunmed

Please use the hook code below:

add_filter(“wpdiscuz_validate_nonce_for_guests”,”__return_false”)

Insert this code into the functions.php file of your active WordPress theme.

Helpful instructions:
https://www.wpbeginner.com/plugins/how-to-allow-php-in-wordpress-posts-and-pages/

In case you want to say thank you! 🙂
We'd really appreciate if you leave a good review on the plugin page.
This is the best way to say thank you to this project and the support team.

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sunmed

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Mar 16, 2026 5:18 pm

(@sunmed)

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Hello,

in my case the good line is:

add_filter('wpdiscuz_validate_nonce_for_guests', '__return_false');

it is ok now in 7.6.47

Thanks a lot for help

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userwpdiscuz

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Mar 17, 2026 7:33 am

(@userwpdiscuz)

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I’ve been having the same issue on my site for a while now. Visitors can’t leave comments—the comments aren’t even showing up. When I try to leave a comment, it says “nonce is invalid.” It works fine when I disable the plugin.