CVE-2026-7638 (GCVE-0-2026-7638)
Vulnerability from cvelistv5 – Published: 2026-05-02 03:36 – Updated: 2026-05-04 14:56
VLAI?
Title
App Builder <= 5.5.10 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary User Avatar Modification via 'user_id' Parameter
Summary
The App Builder – Create Native Android & iOS Apps On The Flight plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to and including 5.6.0. This is due to missing authorization validation in the `upload_avatar()` function, which accepts an attacker-controlled `user_id` parameter from the POST request body and uses it to update user meta without verifying that the authenticated requester owns or has permission to modify the target account. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the profile avatar of any arbitrary user on the site, including administrators, by supplying a target `user_id` in the request body to the `/wp-json/app-builder/v1/upload-avatar` endpoint.
Severity ?
5.3 (Medium)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| appcheap | App Builder – Create Native Android & iOS Apps On The Flight |
Affected:
0 , ≤ 5.6.0
(semver)
|
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-7638",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-04T14:55:14.745098Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-04T14:56:50.259Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "App Builder \u2013 Create Native Android \u0026 iOS Apps On The Flight",
"vendor": "appcheap",
"versions": [
{
"lessThanOrEqual": "5.6.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Ren Voza"
}
],
"descriptions": [
{
"lang": "en",
"value": "The App Builder \u2013 Create Native Android \u0026 iOS Apps On The Flight plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to and including 5.6.0. This is due to missing authorization validation in the `upload_avatar()` function, which accepts an attacker-controlled `user_id` parameter from the POST request body and uses it to update user meta without verifying that the authenticated requester owns or has permission to modify the target account. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the profile avatar of any arbitrary user on the site, including administrators, by supplying a target `user_id` in the request body to the `/wp-json/app-builder/v1/upload-avatar` endpoint."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "CWE-639 Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-02T03:36:42.852Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2d532ffc-c6f1-41e3-9a59-0706802ab8e2?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvatar.php#L80"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/UploadAvatar.php#L80"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvatar.php#L161"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/UploadAvatar.php#L161"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Traits/Permission.php#L33"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Traits/Permission.php#L33"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/UploadAvatar.php#L80"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/UploadAvatar.php#L161"
},
{
"url": "https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Traits/Permission.php#L33"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-01T15:33:11.000Z",
"value": "Disclosed"
}
],
"title": "App Builder \u003c= 5.5.10 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary User Avatar Modification via \u0027user_id\u0027 Parameter"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-7638",
"datePublished": "2026-05-02T03:36:42.852Z",
"dateReserved": "2026-05-01T15:32:16.078Z",
"dateUpdated": "2026-05-04T14:56:50.259Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-7638",
"date": "2026-05-06",
"epss": "0.00043",
"percentile": "0.1308"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-7638\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-05-02T04:16:23.927\",\"lastModified\":\"2026-05-05T19:17:22.860\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The App Builder \u2013 Create Native Android \u0026 iOS Apps On The Flight plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to and including 5.6.0. This is due to missing authorization validation in the `upload_avatar()` function, which accepts an attacker-controlled `user_id` parameter from the POST request body and uses it to update user meta without verifying that the authenticated requester owns or has permission to modify the target account. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the profile avatar of any arbitrary user on the site, including administrators, by supplying a target `user_id` in the request body to the `/wp-json/app-builder/v1/upload-avatar` endpoint.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-639\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/UploadAvatar.php#L161\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/UploadAvatar.php#L80\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Traits/Permission.php#L33\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/UploadAvatar.php#L161\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/UploadAvatar.php#L80\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Traits/Permission.php#L33\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvatar.php#L161\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvatar.php#L80\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Traits/Permission.php#L33\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/2d532ffc-c6f1-41e3-9a59-0706802ab8e2?source=cve\",\"source\":\"security@wordfence.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-7638\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-04T14:55:14.745098Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-04T14:56:37.880Z\"}}], \"cna\": {\"title\": \"App Builder \u003c= 5.5.10 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary User Avatar Modification via \u0027user_id\u0027 Parameter\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Ren Voza\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"appcheap\", \"product\": \"App Builder \\u2013 Create Native Android \u0026 iOS Apps On The Flight\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.6.0\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-05-01T15:33:11.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/2d532ffc-c6f1-41e3-9a59-0706802ab8e2?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvatar.php#L80\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/UploadAvatar.php#L80\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvatar.php#L161\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/UploadAvatar.php#L161\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Traits/Permission.php#L33\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Traits/Permission.php#L33\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/UploadAvatar.php#L80\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/UploadAvatar.php#L161\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Traits/Permission.php#L33\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The App Builder \\u2013 Create Native Android \u0026 iOS Apps On The Flight plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to and including 5.6.0. This is due to missing authorization validation in the `upload_avatar()` function, which accepts an attacker-controlled `user_id` parameter from the POST request body and uses it to update user meta without verifying that the authenticated requester owns or has permission to modify the target account. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the profile avatar of any arbitrary user on the site, including administrators, by supplying a target `user_id` in the request body to the `/wp-json/app-builder/v1/upload-avatar` endpoint.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-639\", \"description\": \"CWE-639 Authorization Bypass Through User-Controlled Key\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-05-02T03:36:42.852Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-7638\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-04T14:56:50.259Z\", \"dateReserved\": \"2026-05-01T15:32:16.078Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-05-02T03:36:42.852Z\", \"assignerShortName\": \"Wordfence\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
Loading…
Loading…