mXSS in AntiSamy

{
  "id": "7e131dc182c4ee21d8abb4501068bf99fb707e93937e76ec0fe465b8d631148a",
  "url": "https://osv.dev/vulnerability/CVE-2023-43643",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mXSS in AntiSamy",
    "summary": "AntiSamy is a library for performing fast, configurable cleansing of HTML coming from untrusted sources. Prior to version 1.7.4, there is a potential for a mutation XSS (mXSS) vulnerability in AntiSamy caused by flawed parsing of the HTML being sanitized. To be subject to this vulnerability the `preserveComments` directive must be enabled in your policy file and also allow for certain tags at the same time. As a result, certain crafty inputs can result in elements in comment tags being interpreted as executable when using AntiSamy's sanitized output. This issue has been patched in AntiSamy 1.7.4 and later.",
    "evidence": "osv:CVE-2023-43643",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-43643",
      "aliases": [
        "CVE-2023-43643",
        "GHSA-pcf2-gh6g-h5r2"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nahsra/antisamy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "45c78f1b4de6e30ce18a7338fd6d200d60be1a05"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:antisamy_project:antisamy:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.7.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "45c78f1b4de6e30ce18a7338fd6d200d60be1a05"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.7.4"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.7.3",
            "v1.7.2",
            "v1.7.1",
            "v1.7.0",
            "v1.6.8",
            "v1.6.7",
            "v1.6.6.1",
            "v1.6.6",
            "v1.6.5",
            "v1.6.4",
            "1.6.3",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0",
            "v1.5.13",
            "v1.5.12",
            "v1.5.11",
            "v1.5.10",
            "v1.5.9",
            "v1.5.8",
            "v1.5.7"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-43643.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.795686262Z",
      "provider": "osv",
      "references": [
        "https://github.com/nahsra/antisamy/releases/tag/v1.7.4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43643.json",
        "https://github.com/nahsra/antisamy/security/advisories/GHSA-pcf2-gh6g-h5r2",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-43643"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43643.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-43643",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513658,
  "published_at": "2023-10-09T13:31:46.324+00:00"
}