Vulnerability-Lookup

GHSA-VHHC-PP7M-QVPP

Vulnerability from github – Published: 2026-01-21 18:30 – Updated: 2026-01-21 18:30

Details

GetSimple CMS Custom JS 0.1 plugin contains a cross-site request forgery vulnerability that allows unauthenticated attackers to inject arbitrary client-side code into administrator browsers. Attackers can craft a malicious website that triggers a cross-site scripting payload to execute remote code on the hosting server when an authenticated administrator visits the page.

Severity

5.3 (Medium)


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

8.5 (High)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47860"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-21T18:16:17Z",
    "severity": "HIGH"
  },
  "details": "GetSimple CMS Custom JS 0.1 plugin contains a cross-site request forgery vulnerability that allows unauthenticated attackers to inject arbitrary client-side code into administrator browsers. Attackers can craft a malicious website that triggers a cross-site scripting payload to execute remote code on the hosting server when an authenticated administrator visits the page.",
  "id": "GHSA-vhhc-pp7m-qvpp",
  "modified": "2026-01-21T18:30:31Z",
  "published": "2026-01-21T18:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47860"
    },
    {
      "type": "WEB",
      "url": "https://github.com/GetSimpleCMS/GetSimpleCMS"
    },
    {
      "type": "WEB",
      "url": "https://github.com/boku7/gsCMS-CustomJS-Csrf2Xss2Rce"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49712"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49816"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rce"
    },
    {
      "type": "WEB",
      "url": "http://get-simple.info"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/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-2021-47860 (GCVE-0-2021-47860)

Vulnerability from cvelistv5 – Published: 2026-01-21 17:29 – Updated: 2026-04-07 14:06

Title

GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE

Summary

Severity

8.5 (High)


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

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-22 16:48 UTC

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)

Assigner

VulnCheck mitre root

References

6 references

URL	Tags
https://www.exploit-db.com/exploits/49816	exploit
http://get-simple.info	product
https://github.com/GetSimpleCMS/GetSimpleCMS	product
https://github.com/boku7/gsCMS-CustomJS-Csrf2Xss2Rce	technical-descriptionexploit
https://www.exploit-db.com/exploits/49712	exploit
https://www.vulncheck.com/advisories/getsimple-cm…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
GetSimple CMS	Custom JS Plugin	Affected: 0.1 cpe:2.3:a:getsimple-ce:getsimple_cms:0.1:::::::*

Date Public

2021-03-26 00:00

Credits

Bobby Cooke (boku) & Abhishek Joshi

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47860",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-22T16:48:07.644254Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-22T16:51:09.944Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Custom JS Plugin",
          "vendor": "GetSimple CMS",
          "versions": [
            {
              "status": "affected",
              "version": "0.1"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:getsimple-ce:getsimple_cms:0.1:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "finder",
          "value": "Bobby Cooke (boku) \u0026 Abhishek Joshi"
        }
      ],
      "datePublic": "2021-03-26T00:00:00.000Z",
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        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
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            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
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            "version": "4.0",
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            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS"
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        {
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            "attackVector": "NETWORK",
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            "privilegesRequired": "NONE",
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            "userInteraction": "NONE",
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          "tags": [
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        },
        {
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        },
        {
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          "tags": [
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        },
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          "url": "https://www.exploit-db.com/exploits/49712"
        },
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          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rce"
        }
      ],
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2021-47860",
    "datePublished": "2026-01-21T17:29:56.337Z",
    "dateReserved": "2026-01-18T12:35:05.169Z",
    "dateUpdated": "2026-04-07T14:06:20.133Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.