tidy-html5 — security advisory

{
  "id": "4d599581066fd8928fb0900414ba2997e9d54631af19ac223f1e088147d1b9bd",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-33391",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2021-33391",
    "summary": "An issue in HTACG HTML Tidy v5.7.28 allows attacker to execute arbitrary code via the -g option of the CleanNode() function in gdoc.c.",
    "evidence": "osv:DEBIAN-CVE-2021-33391",
    "products": [
      {
        "name": {
          "value": "tidy-html5",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2:5.6.0-11",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:5.7.45-1~exp1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:5.8.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:5.8.0-1~exp1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:5.8.0-1~exp2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:5.8.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:5.8.0-2.1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "tidy-html5",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2:5.8.0-2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "tidy-html5",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2:5.8.0-2",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "DEBIAN-CVE-2021-33391",
      "aliases": [
        "DEBIAN-CVE-2021-33391"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "tidy-html5",
            "purl": "pkg:deb/debian/tidy-html5?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "2:5.6.0-11",
            "2:5.7.45-1~exp1",
            "2:5.8.0-1",
            "2:5.8.0-1~exp1",
            "2:5.8.0-1~exp2",
            "2:5.8.0-2",
            "2:5.8.0-2.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-33391.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2:5.8.0-2"
                }
              ]
            }
          ],
          "package": {
            "name": "tidy-html5",
            "purl": "pkg:deb/debian/tidy-html5?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-33391.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2:5.8.0-2"
                }
              ]
            }
          ],
          "package": {
            "name": "tidy-html5",
            "purl": "pkg:deb/debian/tidy-html5?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-33391.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-23T18:03:14.247483275Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-33391"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2021-33391"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-33391",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 420911,
  "published_at": "2023-02-17T18:15:11.187+00:00"
}