Security advisory

{
  "id": "17deb9efbd24deb8e8107b501edae24fbf35e3cb71cfe76c8f77d74432b6c8f7",
  "url": "https://osv.dev/vulnerability/CVE-2020-25631",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-25631",
    "summary": "A vulnerability was found in Moodle 3.9 to 3.9.1, 3.8 to 3.8.4 and 3.7 to 3.7.7 where it was possible to include JavaScript in a book's chapter title, which was not escaped on the \"Add new chapter\" page. This is fixed in 3.9.2, 3.8.5 and 3.7.8.",
    "evidence": "osv:CVE-2020-25631",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-25631",
      "aliases": [
        "BIT-moodle-2020-25631",
        "CVE-2020-25631",
        "GHSA-4w4j-9533-82qg"
      ],
      "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/moodle/moodle",
              "type": "GIT",
              "events": [
                {
                  "introduced": "89457b26d192c06325bb6782b85d1025dafbefe9"
                },
                {
                  "fixed": "f6e37fe19539b61afd3beb8685ffbff028e4ddf5"
                },
                {
                  "introduced": "f968cd44e8ee5d54b1bc56823040ff770dbf18af"
                },
                {
                  "fixed": "b21d86f807d355a3773a9b084d2ddb80c5e6b7ec"
                },
                {
                  "introduced": "500c131eb49771e36f68d151dfa37fef5a9bc2df"
                },
                {
                  "fixed": "ccd4ef8ddd03d98b84e3231866b8b1e024dab1db"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.7.0"
                      },
                      {
                        "fixed": "3.7.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.8.0"
                      },
                      {
                        "fixed": "3.8.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.9.0"
                      },
                      {
                        "fixed": "3.9.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.7.7",
            "v3.8.4",
            "v3.9.1",
            "v3.9.0",
            "v3.8.3",
            "v3.7.6",
            "v3.7.5",
            "v3.8.2",
            "v3.8.1",
            "v3.7.4",
            "v3.8.0",
            "v3.7.3",
            "v3.7.2",
            "v3.7.0",
            "v3.7.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-25631.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:56.329747002Z",
      "provider": "osv",
      "references": [
        "https://moodle.org/mod/forum/discuss.php?d=410843"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-25631",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438647,
  "published_at": "2020-12-08T01:15:12.007+00:00"
}