Vulnerability-Lookup

GHSA-474V-G7V9-75HP

Vulnerability from github – Published: 2026-01-16 00:30 – Updated: 2026-01-16 00:30

Details

GravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configuration and execute PHP code through the scheduler endpoint. Attackers can exploit the admin-nonce parameter to inject base64-encoded payloads and create malicious custom jobs with system command execution.

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47812"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-16T00:16:26Z",
    "severity": "CRITICAL"
  },
  "details": "GravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configuration and execute PHP code through the scheduler endpoint. Attackers can exploit the admin-nonce parameter to inject base64-encoded payloads and create malicious custom jobs with system command execution.",
  "id": "GHSA-474v-g7v9-75hp",
  "modified": "2026-01-16T00:30:55Z",
  "published": "2026-01-16T00:30:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47812"
    },
    {
      "type": "WEB",
      "url": "https://getgrav.org"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49973"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2021-47812 (GCVE-0-2021-47812)

Vulnerability from cvelistv5 – Published: 2026-01-15 23:25 – Updated: 2026-01-16 21:11

Title

GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2)

Summary

Severity ?

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck

References

URL

Tags

	https://www.exploit-db.com/exploits/49973	exploit
	https://getgrav.org	product
	https://www.vulncheck.com/advisories/gravcms-arbi…	third-party-advisory

Impacted products

	Vendor	Product	Version
	Getgrav	GravCMS	Affected: 1.10.7

Credits

legend

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47812",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-16T16:04:12.877202Z",
                "version": "2.0.3"
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        }
      ],
      "metrics": [
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            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
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        },
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          "url": "https://www.vulncheck.com/advisories/gravcms-arbitrary-yaml-writeupdate-unauthenticated"
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Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-474V-G7V9-75HP

CVE-2021-47812 (GCVE-0-2021-47812)

Tags

Sightings

Nomenclature