Search

Find a vulnerability

Search criteria ⓘ Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.

    4 vulnerabilities by express_xss_sanitizer_project

    CVE-2026-33979 (GCVE-0-2026-33979)

    Vulnerability from nvd – Published: 2026-03-27 21:29 – Updated: 2026-03-31 14:29
    VLAI
    Title
    Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)
    Summary
    Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are silently ignored. In version 2.0.2, the validation logic has been updated to respect explicitly provided empty configurations. Now, if allowedTags or allowedAttributes are provided (even if empty), they are passed directly to sanitize-html without being overridden.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-183 - Permissive List of Allowed Inputs
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33979",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T14:29:20.307360Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-31T14:29:43.694Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "express-xss-sanitizer",
          "vendor": "AhmedAdelFahim",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.0.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are silently ignored. In version 2.0.2, the validation logic has been updated to respect explicitly provided empty configurations. Now, if allowedTags or allowedAttributes are provided (even if empty), they are passed directly to sanitize-html without being overridden."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-183",
              "description": "CWE-183: Permissive List of Allowed Inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-27T21:29:19.759Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-3843-rr4g-m8jq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-3843-rr4g-m8jq"
        },
        {
          "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/5623009ef11dcf095c163a38dea07b9cc22ad19f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/5623009ef11dcf095c163a38dea07b9cc22ad19f"
        },
        {
          "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/releases/tag/v2.0.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/releases/tag/v2.0.2"
        }
      ],
      "source": {
        "advisory": "GHSA-3843-rr4g-m8jq",
        "discovery": "UNKNOWN"
      },
      "title": "Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33979",
    "datePublished": "2026-03-27T21:29:19.759Z",
    "dateReserved": "2026-03-24T22:20:06.210Z",
    "dateUpdated": "2026-03-31T14:29:43.694Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2022-21169 (GCVE-0-2022-21169)

    Vulnerability from nvd – Published: 2022-09-26 05:05 – Updated: 2025-05-21 20:29
    VLAI
    Title
    Prototype Pollution
    Summary
    The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.
    Severity
    7.3 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • Prototype Pollution
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a express-xss-sanitizer Affected: unspecified , < 1.1.3 (custom)
    Date Public
    2022-09-26 00:00
    Credits
    Jayateertha Guruprasad
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T02:31:59.240Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://runkit.com/embed/w306l6zfm7tu"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-21169",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-21T20:29:10.261035Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-1321",
                "description": "CWE-1321 Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-21T20:29:25.084Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "express-xss-sanitizer",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "1.1.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jayateertha Guruprasad"
        }
      ],
      "datePublic": "2022-09-26T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "exploitCodeMaturity": "PROOF_OF_CONCEPT",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "remediationLevel": "NOT_DEFINED",
            "reportConfidence": "NOT_DEFINED",
            "scope": "UNCHANGED",
            "temporalScore": 6.9,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Prototype Pollution",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-09-26T05:05:11.000Z",
        "orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
        "shortName": "snyk"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://runkit.com/embed/w306l6zfm7tu"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
        }
      ],
      "title": "Prototype Pollution",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "report@snyk.io",
          "DATE_PUBLIC": "2022-09-26T05:00:10.103193Z",
          "ID": "CVE-2022-21169",
          "STATE": "PUBLIC",
          "TITLE": "Prototype Pollution"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "express-xss-sanitizer",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_value": "1.1.3"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Jayateertha Guruprasad"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Prototype Pollution"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443",
              "refsource": "MISC",
              "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"
            },
            {
              "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4",
              "refsource": "MISC",
              "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"
            },
            {
              "name": "https://runkit.com/embed/w306l6zfm7tu",
              "refsource": "MISC",
              "url": "https://runkit.com/embed/w306l6zfm7tu"
            },
            {
              "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a",
              "refsource": "MISC",
              "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
    "assignerShortName": "snyk",
    "cveId": "CVE-2022-21169",
    "datePublished": "2022-09-26T05:05:11.200Z",
    "dateReserved": "2022-02-24T00:00:00.000Z",
    "dateUpdated": "2025-05-21T20:29:25.084Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

    CVE-2026-33979 (GCVE-0-2026-33979)

    Vulnerability from cvelistv5 – Published: 2026-03-27 21:29 – Updated: 2026-03-31 14:29
    VLAI
    Title
    Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)
    Summary
    Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are silently ignored. In version 2.0.2, the validation logic has been updated to respect explicitly provided empty configurations. Now, if allowedTags or allowedAttributes are provided (even if empty), they are passed directly to sanitize-html without being overridden.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-183 - Permissive List of Allowed Inputs
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33979",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T14:29:20.307360Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-31T14:29:43.694Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "express-xss-sanitizer",
          "vendor": "AhmedAdelFahim",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.0.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are silently ignored. In version 2.0.2, the validation logic has been updated to respect explicitly provided empty configurations. Now, if allowedTags or allowedAttributes are provided (even if empty), they are passed directly to sanitize-html without being overridden."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-183",
              "description": "CWE-183: Permissive List of Allowed Inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-27T21:29:19.759Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-3843-rr4g-m8jq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-3843-rr4g-m8jq"
        },
        {
          "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/5623009ef11dcf095c163a38dea07b9cc22ad19f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/5623009ef11dcf095c163a38dea07b9cc22ad19f"
        },
        {
          "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/releases/tag/v2.0.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/releases/tag/v2.0.2"
        }
      ],
      "source": {
        "advisory": "GHSA-3843-rr4g-m8jq",
        "discovery": "UNKNOWN"
      },
      "title": "Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33979",
    "datePublished": "2026-03-27T21:29:19.759Z",
    "dateReserved": "2026-03-24T22:20:06.210Z",
    "dateUpdated": "2026-03-31T14:29:43.694Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2022-21169 (GCVE-0-2022-21169)

    Vulnerability from cvelistv5 – Published: 2022-09-26 05:05 – Updated: 2025-05-21 20:29
    VLAI
    Title
    Prototype Pollution
    Summary
    The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.
    Severity
    7.3 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • Prototype Pollution
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a express-xss-sanitizer Affected: unspecified , < 1.1.3 (custom)
    Date Public
    2022-09-26 00:00
    Credits
    Jayateertha Guruprasad
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T02:31:59.240Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://runkit.com/embed/w306l6zfm7tu"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-21169",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-21T20:29:10.261035Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-1321",
                "description": "CWE-1321 Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-21T20:29:25.084Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "express-xss-sanitizer",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "1.1.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jayateertha Guruprasad"
        }
      ],
      "datePublic": "2022-09-26T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "exploitCodeMaturity": "PROOF_OF_CONCEPT",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "remediationLevel": "NOT_DEFINED",
            "reportConfidence": "NOT_DEFINED",
            "scope": "UNCHANGED",
            "temporalScore": 6.9,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Prototype Pollution",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-09-26T05:05:11.000Z",
        "orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
        "shortName": "snyk"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://runkit.com/embed/w306l6zfm7tu"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
        }
      ],
      "title": "Prototype Pollution",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "report@snyk.io",
          "DATE_PUBLIC": "2022-09-26T05:00:10.103193Z",
          "ID": "CVE-2022-21169",
          "STATE": "PUBLIC",
          "TITLE": "Prototype Pollution"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "express-xss-sanitizer",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_value": "1.1.3"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Jayateertha Guruprasad"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Prototype Pollution"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443",
              "refsource": "MISC",
              "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"
            },
            {
              "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4",
              "refsource": "MISC",
              "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"
            },
            {
              "name": "https://runkit.com/embed/w306l6zfm7tu",
              "refsource": "MISC",
              "url": "https://runkit.com/embed/w306l6zfm7tu"
            },
            {
              "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a",
              "refsource": "MISC",
              "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
    "assignerShortName": "snyk",
    "cveId": "CVE-2022-21169",
    "datePublished": "2022-09-26T05:05:11.200Z",
    "dateReserved": "2022-02-24T00:00:00.000Z",
    "dateUpdated": "2025-05-21T20:29:25.084Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}