Linkify 4.3.1 - Prototype Pollution & HTML Attribute Injection (XSS)

{
  "id": "0277531af65c99183aa40204c4825246b29b1c84b225db3b99743eeb4a0fd2f4",
  "url": "https://osv.dev/vulnerability/CVE-2025-8101",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Linkify 4.3.1 - Prototype Pollution & HTML Attribute Injection (XSS)",
    "summary": "Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability in Linkify (linkifyjs) allows XSS Targeting HTML Attributes and Manipulating User-Controlled Variables.This issue affects Linkify: from 4.3.1 before 4.3.2.",
    "evidence": "osv:CVE-2025-8101",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-8101",
      "aliases": [
        "CVE-2025-8101",
        "GHSA-95jq-xph2-cx9h"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nfrasser/linkifyjs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "45bc27e8e9552587a18ff17d3adef79df78bc858"
                },
                {
                  "fixed": "3abe9abbcb4e069aeadde2f42de7dfcc2371c0f0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.3.1"
                      },
                      {
                        "fixed": "4.3.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3abe9abbcb4e069aeadde2f42de7dfcc2371c0f0"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.3.2"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.3.1"
                      },
                      {
                        "fixed": "4.3.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.3.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-8101.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.269049327Z",
      "provider": "osv",
      "references": [
        "https://registry.npmjs.org",
        "https://www.npmjs.com/package/linkifyjs",
        "https://fluidattacks.com/advisories/charly",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8101.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-8101",
        "https://github.com/nfrasser/linkifyjs/releases/tag/v4.3.2",
        "https://github.com/nfrasser/linkifyjs"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1321"
        ],
        "cna_assigner": "Fluid Attacks",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8101.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-8101",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493817,
  "published_at": "2025-07-25T21:52:47.287+00:00"
}