CVE-2026-19943 (GCVE-0-2026-19943)
Vulnerability from cvelistv5
Published
2026-08-25 03:27
Modified
2026-08-25 18:12
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'titleTag' Block Attribute in all versions up to, and including, 4.0.2 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 malicious titleTag value survives wp_kses_post on save because it is stored inside a block-comment delimiter and the live HTML is only synthesized at render time by do_blocks(), meaning the payload also fires in administrator and editor sessions during post preview.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| jegstudio | Gutenverse – WordPress Blocks, Page Builder & Site Editor |
Version: 0 ≤ 4.0.2 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-19943",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-25T18:11:52.166337Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-25T18:12:00.782Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Gutenverse \u2013 WordPress Blocks, Page Builder \u0026 Site Editor",
"vendor": "jegstudio",
"versions": [
{
"lessThanOrEqual": "4.0.2",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Wordfence PRISM"
}
],
"descriptions": [
{
"lang": "en",
"value": "The Gutenverse \u2013 WordPress Blocks, Page Builder \u0026 Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via \u0027titleTag\u0027 Block Attribute in all versions up to, and including, 4.0.2 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 malicious titleTag value survives wp_kses_post on save because it is stored inside a block-comment delimiter and the live HTML is only synthesized at render time by do_blocks(), meaning the payload also fires in administrator and editor sessions during post preview."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/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": "2026-08-25T03:27:07.375Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/b7eb4cac-cf16-438e-81cc-516646e77cdc?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.0/includes/block/class-chart.php#L80"
},
{
"url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.2/includes/block/class-chart.php#L80"
},
{
"url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.2/includes/block/class-chart.php#L28"
},
{
"url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.0/includes/block/class-chart.php#L28"
},
{
"url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3662715%40gutenverse\u0026new=3662715%40gutenverse"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-08-15T17:01:52.000Z",
"value": "Vendor Notified"
},
{
"lang": "en",
"time": "2026-08-24T14:33:15.000Z",
"value": "Disclosed"
}
],
"title": "Gutenverse \u003c= 4.0.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via \u0027titleTag\u0027 Block Attribute"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-19943",
"datePublished": "2026-08-25T03:27:07.375Z",
"dateReserved": "2026-08-15T16:46:46.424Z",
"dateUpdated": "2026-08-25T18:12:00.782Z",
"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-2026-19943\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-25T18:11:52.166337Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-25T18:11:56.403Z\"}}], \"cna\": {\"title\": \"Gutenverse \u003c= 4.0.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via \u0027titleTag\u0027 Block Attribute\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Wordfence PRISM\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 6.4, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"jegstudio\", \"product\": \"Gutenverse \\u2013 WordPress Blocks, Page Builder \u0026 Site Editor\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.0.2\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-08-15T17:01:52.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-08-24T14:33:15.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/b7eb4cac-cf16-438e-81cc-516646e77cdc?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.0/includes/block/class-chart.php#L80\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.2/includes/block/class-chart.php#L80\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.2/includes/block/class-chart.php#L28\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.0/includes/block/class-chart.php#L28\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3662715%40gutenverse\u0026new=3662715%40gutenverse\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Gutenverse \\u2013 WordPress Blocks, Page Builder \u0026 Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via \u0027titleTag\u0027 Block Attribute in all versions up to, and including, 4.0.2 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 malicious titleTag value survives wp_kses_post on save because it is stored inside a block-comment delimiter and the live HTML is only synthesized at render time by do_blocks(), meaning the payload also fires in administrator and editor sessions during post preview.\"}], \"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\": \"2026-08-25T03:27:07.375Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-19943\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-25T18:12:00.782Z\", \"dateReserved\": \"2026-08-15T16:46:46.424Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-08-25T03:27:07.375Z\", \"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…