CVE-2026-18404 (GCVE-0-2026-18404)
Vulnerability from cvelistv5 – Published: 2026-09-05 05:30 – Updated: 2026-09-05 05:30
VLAI
EPSS
VEX
Title
Social Chat <= 8.6.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'consent_message' JSON Attribute in .qlwapp data-box
Summary
The Social Chat – Click To Chat App Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'consent_message' JSON Attribute in .qlwapp data-box in all versions up to, and including, 8.6.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit requires no user interaction beyond page load, as setting auto_open and consent_enabled to 'yes' in the injected data-box JSON causes the consent box — and the embedded script — to execute immediately on page load.
Severity
6.4 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| quadlayers | Social Chat – Click To Chat App Button |
Affected:
0 , ≤ 8.6.2
(semver)
|
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Social Chat \u2013 Click To Chat App Button",
"vendor": "quadlayers",
"versions": [
{
"lessThanOrEqual": "8.6.2",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "suyoung kim(AhnLab)"
}
],
"descriptions": [
{
"lang": "en",
"value": "The Social Chat \u2013 Click To Chat App Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via \u0027consent_message\u0027 JSON Attribute in .qlwapp data-box in all versions up to, and including, 8.6.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit requires no user interaction beyond page load, as setting auto_open and consent_enabled to \u0027yes\u0027 in the injected data-box JSON causes the consent box \u2014 and the embedded script \u2014 to execute immediately on page load."
}
],
"metrics": [
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"cvssV3_1": {
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
"version": "3.1"
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"problemTypes": [
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"descriptions": [
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"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-05T05:30:56.592Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/f159392b-5bc6-4c12-a924-13ea170bb7fa?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/build/frontend/js/index.js#L2"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/lib/controllers/class-frontend.php#L86"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/build/frontend/js/index.js#L2"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/lib/controllers/class-frontend.php#L86"
},
{
"url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3667778%40wp-whatsapp-chat%2Ftags%2F8.6.3\u0026old=3664149%40wp-whatsapp-chat%2Ftags%2F8.6.2"
},
{
"url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Fwp-whatsapp-chat/tags/8.6.2\u0026new_path=%2Fwp-whatsapp-chat/tags/8.6.3"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-09-04T17:07:05.000Z",
"value": "Disclosed"
}
],
"title": "Social Chat \u003c= 8.6.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via \u0027consent_message\u0027 JSON Attribute in .qlwapp data-box"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-18404",
"datePublished": "2026-09-05T05:30:56.592Z",
"dateReserved": "2026-07-30T15:54:28.110Z",
"dateUpdated": "2026-09-05T05:30:56.592Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-18404",
"date": "2026-09-05",
"epss": "0.00201",
"percentile": "0.09976"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-18404\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-09-05T06:17:09.577\",\"lastModified\":\"2026-09-05T06:17:09.577\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The Social Chat \u2013 Click To Chat App Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via \u0027consent_message\u0027 JSON Attribute in .qlwapp data-box in all versions up to, and including, 8.6.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit requires no user interaction beyond page load, as setting auto_open and consent_enabled to \u0027yes\u0027 in the injected data-box JSON causes the consent box \u2014 and the embedded script \u2014 to execute immediately on page load.\"}],\"affected\":[{\"source\":\"security@wordfence.com\",\"affectedData\":[{\"vendor\":\"quadlayers\",\"product\":\"Social Chat \u2013 Click To Chat App Button\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThanOrEqual\":\"8.6.2\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\",\"baseScore\":6.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":2.7}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/build/frontend/js/index.js#L2\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/lib/controllers/class-frontend.php#L86\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/build/frontend/js/index.js#L2\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/lib/controllers/class-frontend.php#L86\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/changeset?old_path=%2Fwp-whatsapp-chat/tags/8.6.2\u0026new_path=%2Fwp-whatsapp-chat/tags/8.6.3\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3667778%40wp-whatsapp-chat%2Ftags%2F8.6.3\u0026old=3664149%40wp-whatsapp-chat%2Ftags%2F8.6.2\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/f159392b-5bc6-4c12-a924-13ea170bb7fa?source=cve\",\"source\":\"security@wordfence.com\"}]}}"
}
}
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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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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