GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-44543 (GCVE-0-2021-44543)

Vulnerability from cvelistv5 – Published: 2021-12-23 19:48 – Updated: 2024-08-04 04:25
VLAI
Summary
An XSS vulnerability was found in Privoxy which was fixed in cgi_error_no_template() by encode the template name when Privoxy is configured to servce the user-manual itself.
Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a privoxy Affected: Privoxy 3.0.33
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:25:16.806Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html%2C"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.privoxy.org/gitweb/?p=privoxy.git%3Ba=commit%3Bh=0e668e9409c"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "privoxy",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Privoxy 3.0.33"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An XSS vulnerability was found in Privoxy which was fixed in cgi_error_no_template() by encode the template name when Privoxy is configured to servce the user-manual itself."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-12-23T19:48:44.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html%2C"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.privoxy.org/gitweb/?p=privoxy.git%3Ba=commit%3Bh=0e668e9409c"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2021-44543",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "privoxy",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Privoxy 3.0.33"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An XSS vulnerability was found in Privoxy which was fixed in cgi_error_no_template() by encode the template name when Privoxy is configured to servce the user-manual itself."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-79"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html,",
              "refsource": "MISC",
              "url": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html,"
            },
            {
              "name": "https://www.privoxy.org/gitweb/?p=privoxy.git;a=commit;h=0e668e9409c",
              "refsource": "MISC",
              "url": "https://www.privoxy.org/gitweb/?p=privoxy.git;a=commit;h=0e668e9409c"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-44543",
    "datePublished": "2021-12-23T19:48:44.000Z",
    "dateReserved": "2021-12-03T00:00:00.000Z",
    "dateUpdated": "2024-08-04T04:25:16.806Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-44543",
      "date": "2026-09-19",
      "epss": "0.0077",
      "percentile": "0.54104"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:privoxy:privoxy:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "068EEA45-2037-4304-9959-A789314617F7",
                  "versionEndExcluding": "3.0.33",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An XSS vulnerability was found in Privoxy which was fixed in cgi_error_no_template() by encode the template name when Privoxy is configured to servce the user-manual itself."
        },
        {
          "lang": "es",
          "value": "Se encontr\u00f3 una vulnerabilidad de tipo XSS en Privoxy que fue corregida en la funci\u00f3n cgi_error_no_template(), al codificar el nombre de la plantilla cuando Privoxy est\u00e1 configurado para servir el propio manual de usuario"
        }
      ],
      "id": "CVE-2021-44543",
      "lastModified": "2024-11-21T06:31:11.973",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "LOW",
            "cvssData": {
              "accessComplexity": "HIGH",
              "accessVector": "NETWORK",
              "authentication": "NONE",
              "availabilityImpact": "NONE",
              "baseScore": 2.6,
              "confidentialityImpact": "NONE",
              "integrityImpact": "PARTIAL",
              "vectorString": "AV:N/AC:H/Au:N/C:N/I:P/A:N",
              "version": "2.0"
            },
            "exploitabilityScore": 4.9,
            "impactScore": 2.9,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": true
          }
        ],
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.1,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
              "version": "3.1"
            },
            "exploitabilityScore": 2.8,
            "impactScore": 2.7,
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      },
      "published": "2021-12-23T20:15:12.097",
      "references": [
        {
          "source": "secalert@redhat.com",
          "url": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html%2C"
        },
        {
          "source": "secalert@redhat.com",
          "url": "https://www.privoxy.org/gitweb/?p=privoxy.git%3Ba=commit%3Bh=0e668e9409c"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html%2C"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://www.privoxy.org/gitweb/?p=privoxy.git%3Ba=commit%3Bh=0e668e9409c"
        }
      ],
      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-79"
            }
          ],
          "source": "secalert@redhat.com",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "privoxy",
                "vendor": "n/a",
                "versions": [
                  {
                    "status": "affected",
                    "version": "Privoxy 3.0.33"
                  }
                ]
              }
            ],
            "source": "secalert@redhat.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:privoxy:privoxy:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "068EEA45-2037-4304-9959-A789314617F7",
                    "versionEndExcluding": "3.0.33",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "An XSS vulnerability was found in Privoxy which was fixed in cgi_error_no_template() by encode the template name when Privoxy is configured to servce the user-manual itself."
          },
          {
            "lang": "es",
            "value": "Se encontr\u00f3 una vulnerabilidad de tipo XSS en Privoxy que fue corregida en la funci\u00f3n cgi_error_no_template(), al codificar el nombre de la plantilla cuando Privoxy est\u00e1 configurado para servir el propio manual de usuario"
          }
        ],
        "id": "CVE-2021-44543",
        "lastModified": "2026-06-17T04:12:32.723",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "HIGH",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 2.6,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:H/Au:N/C:N/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 4.9,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.1,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 2.7,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-12-23T20:15:12.097",
        "references": [
          {
            "source": "secalert@redhat.com",
            "url": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html%2C"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://www.privoxy.org/gitweb/?p=privoxy.git%3Ba=commit%3Bh=0e668e9409c"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.privoxy.org/3.0.33/user-manual/whatsnew.html%2C"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.privoxy.org/gitweb/?p=privoxy.git%3Ba=commit%3Bh=0e668e9409c"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-79"
              }
            ],
            "source": "secalert@redhat.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T13:18:25+00:00",
      "cve": "CVE-2021-44543",
      "id": "CVE-2021-44543",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2021-44543",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-44543.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2025-03-15T08:36:10Z",
      "cve": "CVE-2021-44543",
      "id": "CVE-2021-44543",
      "initial_release_date": "2023-02-15T03:36:36Z",
      "product_status:recommended": "12",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-44543",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-44543.json",
      "version": "6"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.