EUVD-2026-40936
GHSA-69gg-pvp7-2fx5
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Network-reachable REST endpoint requires only Author-level credentials (PR:L); no confidentiality or availability impact; integrity limited to style data modification.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
The Qi Blocks plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.4.9 via the 'page_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with author-level access and above, to modify the stored Qi Blocks styles of arbitrary posts, templates, or widgets they do not own - including site-wide surfaces via the reserved 'template' and 'widget' page_id values - enabling unauthorized frontend defacement, content hiding, and degradation of any page on the site. The endpoint's permission_callback checks only the generic edit_posts and publish_posts capabilities, meaning any user with the built-in Author role satisfies the check regardless of post ownership.
AnalysisAI
Insecure Direct Object Reference in the Qi Blocks WordPress plugin (all versions ≤ 1.4.9) allows any authenticated user with Author-level access to overwrite the stored global styles of arbitrary posts, templates, or widgets they do not own by manipulating the unvalidated 'page_id' parameter. Critically, the reserved 'template' and 'widget' page_id values expose site-wide surfaces, enabling an Author to deface, hide content on, or visually degrade any page across the entire WordPress installation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid WordPress user account with at minimum the built-in Author role, which grants the edit_posts and publish_posts capabilities checked by the endpoint's permission_callback. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.1 score of 4.3 (Medium) with vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N accurately reflects the mechanical severity: network-reachable, low complexity, requires low-privilege authentication, no user interaction needed, and limited to integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has registered or compromised an Author-level account on a target WordPress site crafts a POST request to the Qi Blocks global styles endpoint, substituting the 'page_id' value with the reserved string 'template' instead of one of their own post IDs. The server's permission_callback passes because the attacker holds edit_posts and publish_posts capabilities, and no ownership check is performed. … |
| Remediation | Upstream fix available (Trac changeset 3572812 at plugins.trac.wordpress.org); a released patched version number beyond 1.4.9 is not independently confirmed from the available data - monitor the WordPress plugin repository for an update and apply it as soon as it is published. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Authentication Bypass
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External POC / Exploit Code
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