Vulnerability-Lookup

GHSA-WGC6-9F6W-H8HX

Vulnerability from github – Published: 2025-06-17 21:32 – Updated: 2025-06-18 17:11

Summary

Withdrawn Advisory: microlight allows a denial of service

Details

Withdrawn Advisory

This advisory has been withdrawn because the proof of concept does not demonstrate a practical security impact. This link is maintained to preserve external references.

Original Description

A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large content (e.g., 100 million characters) is processed, the reset function in microlight.js consumes excessive memory and CPU resources, causing browser crashes or unresponsiveness. An attacker can exploit this vulnerability by tricking a user into visiting a malicious web page containing a microlight element with large content, resulting in a denial of service.

Severity

2.0 (Low)


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

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "microlight"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-45526"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-17T22:36:41Z",
    "nvd_published_at": "2025-06-17T20:15:32Z",
    "severity": "LOW"
  },
  "details": "## Withdrawn Advisory\nThis advisory has been withdrawn because the proof of concept does not demonstrate a practical security impact. This link is maintained to preserve external references.\n\n## Original Description\nA denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large content (e.g., 100 million characters) is processed, the reset function in microlight.js consumes excessive memory and CPU resources, causing browser crashes or unresponsiveness. An attacker can exploit this vulnerability by tricking a user into visiting a malicious web page containing a microlight element with large content, resulting in a denial of service.",
  "id": "GHSA-wgc6-9f6w-h8hx",
  "modified": "2025-06-18T17:11:34Z",
  "published": "2025-06-17T21:32:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-45526"
    },
    {
      "type": "WEB",
      "url": "https://github.com/github/advisory-database/pull/5730"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/Rootingg/483b09b760d031b62b172f2153f3ed2a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/asvd/microlight"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Withdrawn Advisory: microlight allows a denial of service",
  "withdrawn": "2025-06-18T17:11:34Z"
}

CVE-2025-45526 (GCVE-0-2025-45526)

Vulnerability from cvelistv5 – Published: 2025-06-17 00:00 – Updated: 2025-06-26 16:10 Disputed

Summary

Severity

2.9 (Low)


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

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

mitre

References

2 references

URL	Tags
https://gist.github.com/Rootingg/483b09b760d031b6…
https://github.com/github/advisory-database/pull/5730

Impacted products

1 product

Vendor	Product	Version
asvd	microlight	Affected: 0 , ≤ 0.0.7 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-45526",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-26T16:10:14.187631Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-26T16:10:51.373Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://gist.github.com/Rootingg/483b09b760d031b62b172f2153f3ed2a"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "microlight",
          "vendor": "asvd",
          "versions": [
            {
              "lessThanOrEqual": "0.0.7",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large content (e.g., 100 million characters) is processed, the reset function in microlight.js consumes excessive memory and CPU resources, causing browser crashes or unresponsiveness. An attacker can exploit this vulnerability by tricking a user into visiting a malicious web page containing a microlight element with large content, resulting in a denial of service. NOTE: this is disputed by multiple parties because a large amount of memory and CPU resources is expected to be needed for content of that size."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 2.9,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T18:32:18.220Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://gist.github.com/Rootingg/483b09b760d031b62b172f2153f3ed2a"
        },
        {
          "url": "https://github.com/github/advisory-database/pull/5730"
        }
      ],
      "tags": [
        "disputed"
      ],
      "x_generator": {
        "engine": "enrichogram 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2025-45526",
    "datePublished": "2025-06-17T00:00:00.000Z",
    "dateReserved": "2025-04-22T00:00:00.000Z",
    "dateUpdated": "2025-06-26T16:10:51.373Z",
    "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.

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