Medium
Security advisory
Laravel is a web application framework. Laravel prior to versions 8.75.0, 7.30.6, and 6.20.42 contain a possible cross-site scripting (XSS) vulnerability in the Blade templating engine. A broken HTML element may be clicked and the user taken to another location in their browser due to XSS. This is due to the user being able to guess the parent placeholder SHA-1 hash by trying common names of sections. If the parent template contains an exploitable HTML structure an XSS vulnerability can be exposed. This vulnerability has been patched in versions 8.75.0, 7.30.6, and 6.20.42 by determining the parent placeholder at runtime and using a random hash that is unique to each request.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-43808
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:00 UTC · Revision 1
Source evidence
Laravel is a web application framework. Laravel prior to versions 8.75.0, 7.30.6, and 6.20.42 contain a possible cross-site scripting (XSS) vulnerability in the Blade templating engine. A broken HTML element may be clicked and the user taken to another location in their browser due to XSS. This is due to the user being able to guess the parent placeholder SHA-1 hash by trying common names of sections. If the parent template contains an exploitable HTML structure an XSS vulnerability can be exposed. This vulnerability has been patched in versions 8.75.0, 7.30.6, and 6.20.42 by determining the parent placeholder at runtime and using a random hash that is unique to each request.
osv:CVE-2021-43808
Complete source record
{
"id": "5ca1a76334731cdea7f5949eacb0626caaae216df917a34f3c530d919e48f573",
"url": "https://osv.dev/vulnerability/CVE-2021-43808",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-43808",
"summary": "Laravel is a web application framework. Laravel prior to versions 8.75.0, 7.30.6, and 6.20.42 contain a possible cross-site scripting (XSS) vulnerability in the Blade templating engine. A broken HTML element may be clicked and the user taken to another location in their browser due to XSS. This is due to the user being able to guess the parent placeholder SHA-1 hash by trying common names of sections. If the parent template contains an exploitable HTML structure an XSS vulnerability can be exposed. This vulnerability has been patched in versions 8.75.0, 7.30.6, and 6.20.42 by determining the parent placeholder at runtime and using a random hash that is unique to each request.",
"evidence": "osv:CVE-2021-43808",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-43808",
"aliases": [
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"GHSA-66hf-2p6w-jqfw"
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"metrics": [
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}
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"modified": "2026-10-20T10:55:04.314245742Z",
"provider": "osv",
"references": [
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"evidence": "/id"
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},
"source_id": "core-osv",
"document_id": 386823,
"published_at": "2021-12-08T00:15:07.683+00:00"
}