CVE-2026-96558 (GCVE-0-2026-96558)
Vulnerability from cvelistv5
Published
2026-10-10 06:40
Modified
2026-10-11 12:23
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
The Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'qsm_hidden_questions' parameter in all versions up to, and including, 11.2.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to force the mlw_results INSERT to fail by submitting an over-length or duplicate qsm_unique_key value, which triggers the audit trail code branch that writes the unescaped payload to wp_mlw_qm_audit_trail.form_data.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| expresstech | Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker |
Version: 0 ≤ 11.2.6 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-96558",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-11T12:14:26.782069Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-11T12:23:56.142Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Quiz and Survey Master (QSM) \u2013 Quiz Maker \u0026 Survey Maker",
"vendor": "expresstech",
"versions": [
{
"lessThanOrEqual": "11.2.6",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Kuba"
}
],
"descriptions": [
{
"lang": "en",
"value": "The Quiz and Survey Master (QSM) \u2013 Quiz Maker \u0026 Survey Maker plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the \u0027qsm_hidden_questions\u0027 parameter in all versions up to, and including, 11.2.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to force the mlw_results INSERT to fail by submitting an over-length or duplicate qsm_unique_key value, which triggers the audit trail code branch that writes the unescaped payload to wp_mlw_qm_audit_trail.form_data."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.2,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-10T06:40:08.050Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0e344974-08c8-45a5-a0f4-3780ce00928b?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/js/qsm-admin.js#L758"
},
{
"url": "https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L3002"
},
{
"url": "https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qsm-audit.php#L36"
},
{
"url": "https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/admin/tools-page.php#L548"
},
{
"url": "https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L2850"
},
{
"url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3711419%40quiz-master-next\u0026new=3711419%40quiz-master-next"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-10-09T17:31:34.000Z",
"value": "Disclosed"
}
],
"title": "Quiz and Survey Master (QSM) \u003c= 11.2.6 - Unauthenticated Stored DOM-Based Cross-Site Scripting via \u0027qsm_hidden_questions\u0027 Parameter"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-96558",
"datePublished": "2026-10-10T06:40:08.050Z",
"dateReserved": "2026-09-23T13:09:01.889Z",
"dateUpdated": "2026-10-11T12:23:56.142Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-96558\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-11T12:14:26.782069Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-11T12:14:27.459Z\"}}], \"cna\": {\"title\": \"Quiz and Survey Master (QSM) \u003c= 11.2.6 - Unauthenticated Stored DOM-Based Cross-Site Scripting via \u0027qsm_hidden_questions\u0027 Parameter\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Kuba\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.2, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"expresstech\", \"product\": \"Quiz and Survey Master (QSM) \\u2013 Quiz Maker \u0026 Survey Maker\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"11.2.6\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-10-09T17:31:34.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/0e344974-08c8-45a5-a0f4-3780ce00928b?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/js/qsm-admin.js#L758\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L3002\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qsm-audit.php#L36\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/admin/tools-page.php#L548\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L2850\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3711419%40quiz-master-next\u0026new=3711419%40quiz-master-next\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Quiz and Survey Master (QSM) \\u2013 Quiz Maker \u0026 Survey Maker plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the \u0027qsm_hidden_questions\u0027 parameter in all versions up to, and including, 11.2.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to force the mlw_results INSERT to fail by submitting an over-length or duplicate qsm_unique_key value, which triggers the audit trail code branch that writes the unescaped payload to wp_mlw_qm_audit_trail.form_data.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-10-10T06:40:08.050Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-96558\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-11T12:23:56.142Z\", \"dateReserved\": \"2026-09-23T13:09:01.889Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-10-10T06:40:08.050Z\", \"assignerShortName\": \"Wordfence\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…