Security advisory

{
  "id": "1e30f2278d7c2cdfb1eab1f225cdbccf8f1202cf91ba3d5e32c15943aab13f38",
  "url": "https://osv.dev/vulnerability/CVE-2018-7753",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-7753",
    "summary": "An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly sanitized if the values contained character entities. Using character entities, it was possible to construct a URI value with a scheme that was not allowed that would slide through unsanitized.",
    "evidence": "osv:CVE-2018-7753",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-7753",
      "aliases": [
        "CVE-2018-7753",
        "GHSA-m9mq-p2f9-cfqv",
        "PYSEC-2018-51"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mozilla/bleach",
              "type": "GIT",
              "events": [
                {
                  "introduced": "cb5f2b865649cebc7bca5c9fba2dfe94aa982b6c"
                },
                {
                  "last_affected": "35d051ca4b54a3a3b16c243cac3f3bb6678e69bb"
                },
                {
                  "fixed": "c5df5789ec3471a31311f42c2d19fc2cf21b35ef"
                },
                {
                  "fixed": "9584f42051c0039cb0f27a617e8ab3e945018cc6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mozilla:bleach:2.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.1"
                      },
                      {
                        "last_affected": "2.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:mozilla:bleach:2.1.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.1.1"
                      },
                      {
                        "last_affected": "2.1.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:mozilla:bleach:2.1.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.1.2"
                      },
                      {
                        "last_affected": "2.1.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c5df5789ec3471a31311f42c2d19fc2cf21b35ef"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9584f42051c0039cb0f27a617e8ab3e945018cc6"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.1.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.1",
            "2.1.1",
            "2.1.2",
            "v2.1.2",
            "v2.1.1",
            "v2.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-7753.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:31.147976453Z",
      "provider": "osv",
      "references": [
        "https://bugs.debian.org/892252",
        "https://github.com/mozilla/bleach/releases/tag/v2.1.3",
        "https://github.com/mozilla/bleach/commit/c5df5789ec3471a31311f42c2d19fc2cf21b35ef"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-7753",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381792,
  "published_at": "2018-03-07T23:29:00.273+00:00"
}