Grav ihas Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, due to improper authorization checks when modifying critical fields on a POST request to /admin/pages/{page_name}, an editor with only permissions to change basic content on the form is now able to change the functioning of the form through modifying the content of the data[_json][header][form] which is the YAML frontmatter which includes the process section which dictates what happens after a user submits the form which include some important actions that could lead to further vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-66301
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 02:15 UTC · Revision 1
Source evidence
Grav ihas Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions
core-osv · Original sourcePublished 1 Dec 2025, 21:30 UTC
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, due to improper authorization checks when modifying critical fields on a POST request to /admin/pages/{page_name}, an editor with only permissions to change basic content on the form is now able to change the functioning of the form through modifying the content of the data[_json][header][form] which is the YAML frontmatter which includes the process section which dictates what happens after a user submits the form which include some important actions that could lead to further vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.
osv:CVE-2025-66301
Complete source record
{
"id": "4d112bbd0c9fcdba20a003306f7fd4c3f09657e548e1bb9f36affd5908ecb982",
"url": "https://osv.dev/vulnerability/CVE-2025-66301",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Grav ihas Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions",
"summary": "Grav is a file-based Web platform. Prior to 1.8.0-beta.27, due to improper authorization checks when modifying critical fields on a POST request to /admin/pages/{page_name}, an editor with only permissions to change basic content on the form is now able to change the functioning of the form through modifying the content of the data[_json][header][form] which is the YAML frontmatter which includes the process section which dictates what happens after a user submits the form which include some important actions that could lead to further vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.",
"evidence": "osv:CVE-2025-66301",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2025-66301",
"aliases": [
"CVE-2025-66301",
"GHSA-v8x2-fjv7-8hjh"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/getgrav/grav",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "0f879bd1d44863dfcf77d7cb640dab604a0dcce2"
}
],
"database_specific": {
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{
"fixed": "1.8.0-beta.27"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-beta.27"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
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"0.9.19",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66301.json"
}
}
],
"modified": "2026-10-28T02:30:52.760131003Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66301.json",
"https://github.com/getgrav/grav/security/advisories/GHSA-v8x2-fjv7-8hjh",
"https://nvd.nist.gov/vuln/detail/CVE-2025-66301"
],
"provider_metadata": {
"cwe_ids": [
"CWE-285"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66301.json"
}
},
"related_cves": [
{
"value": "CVE-2025-66301",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 521695,
"published_at": "2025-12-01T21:30:43.359+00:00"
}