FKIE_CVE-2026-3651
Vulnerability from fkie_nvd - Published: 2026-03-21 04:17 - Updated: 2026-03-23 14:32
Severity ?
Summary
The Build App Online plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.0.23. This is due to the plugin registering the 'build-app-online-update-vendor-product' AJAX action via wp_ajax_nopriv_ without proper authentication checks, capability verification, or nonce validation in the update_vendor_product() function. The function accepts a user-supplied post ID from the request and calls wp_update_post() to modify the post_author field without validating whether the user has permission to modify the specified post. This makes it possible for unauthenticated attackers to modify the post_author of arbitrary posts to 0 (orphaning posts from their legitimate authors), or for authenticated attackers to claim ownership of any post by setting themselves as the author.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The Build App Online plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.0.23. This is due to the plugin registering the \u0027build-app-online-update-vendor-product\u0027 AJAX action via wp_ajax_nopriv_ without proper authentication checks, capability verification, or nonce validation in the update_vendor_product() function. The function accepts a user-supplied post ID from the request and calls wp_update_post() to modify the post_author field without validating whether the user has permission to modify the specified post. This makes it possible for unauthenticated attackers to modify the post_author of arbitrary posts to 0 (orphaning posts from their legitimate authors), or for authenticated attackers to claim ownership of any post by setting themselves as the author."
}
],
"id": "CVE-2026-3651",
"lastModified": "2026-03-23T14:32:02.800",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "security@wordfence.com",
"type": "Primary"
}
]
},
"published": "2026-03-21T04:17:34.023",
"references": [
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/admin/class-build-app-online-admin.php#L556"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/admin/class-build-app-online-admin.php#L565"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/includes/class-build-app-online.php#L233"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/admin/class-build-app-online-admin.php#L556"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/admin/class-build-app-online-admin.php#L565"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/includes/class-build-app-online.php#L233"
},
{
"source": "security@wordfence.com",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/51564b26-0d7c-4499-9f5a-84f76c5a5e8a?source=cve"
}
],
"sourceIdentifier": "security@wordfence.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-862"
}
],
"source": "security@wordfence.com",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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