GSD-2021-20186

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS.
Aliases
Aliases
CVE-2021-20186
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{
  "GSD": {
    "alias": "CVE-2021-20186",
    "description": "It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS.",
    "id": "GSD-2021-20186"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-20186"
      ],
      "details": "It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS.",
      "id": "GSD-2021-20186",
      "modified": "2023-12-13T01:23:11.978594Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2021-20186",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "moodle",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "moodle 3.10.1, moodle 3.9.4, moodle 3.8.7, moodle 3.5.16"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-79"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://moodle.org/mod/forum/discuss.php?d=417170",
            "refsource": "MISC",
            "url": "https://moodle.org/mod/forum/discuss.php?d=417170"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c3.5.16||\u003e=3.8.0,\u003c3.8.7||\u003e=3.9.0,\u003c3.9.4||\u003e=3.10.0,\u003c3.10.1",
          "affected_versions": "All versions before 3.5.16, all versions starting from 3.8.0 before 3.8.7, all versions starting from 3.9.0 before 3.9.4, all versions starting from 3.10.0 before 3.10.1",
          "cvss_v2": "AV:N/AC:H/Au:S/C:P/I:N/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-79",
            "CWE-937"
          ],
          "date": "2021-02-01",
          "description": "It was found in Moodle that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS.",
          "fixed_versions": [
            "3.5.16",
            "3.8.7",
            "3.9.4",
            "3.10.1"
          ],
          "identifier": "CVE-2021-20186",
          "identifiers": [
            "CVE-2021-20186"
          ],
          "not_impacted": "All versions starting from 3.5.16 before 3.8.0, all versions starting from 3.8.7 before 3.9.0, all versions starting from 3.9.4 before 3.10.0, all versions starting from 3.10.1",
          "package_slug": "packagist/moodle/moodle",
          "pubdate": "2021-01-28",
          "solution": "Upgrade to versions 3.5.16, 3.8.7, 3.9.4, 3.10.1 or above.",
          "title": "Cross-site Scripting",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-20186",
            "https://moodle.org/mod/forum/discuss.php?d=417170"
          ],
          "uuid": "69a6ca84-5ad0-4448-b6b5-53d32caa481b"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "3.5.16",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "3.8.7",
                "versionStartIncluding": "3.8.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "3.9.4",
                "versionStartIncluding": "3.9.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "3.10.1",
                "versionStartIncluding": "3.10.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2021-20186"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-79"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://moodle.org/mod/forum/discuss.php?d=417170",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Vendor Advisory"
              ],
              "url": "https://moodle.org/mod/forum/discuss.php?d=417170"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "HIGH",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 2.1,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:H/Au:S/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.3,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2021-02-01T14:55Z",
      "publishedDate": "2021-01-28T19:15Z"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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