Vulnerability-Lookup

FKIE_CVE-2021-24437

Vulnerability from fkie_nvd - Published: 2021-08-30 15:15 - Updated: 2026-06-17 03:40

Severity

6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Summary

The Favicon by RealFaviconGenerator WordPress plugin through 1.3.20 does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator.

References

	URL	Tags
	contact@wpscan.com	https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9	Exploit, Third Party Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9	Exploit, Third Party Advisory

Impacted products

	Vendor	Product	Version
	realfavicongenerator	favicon_by_realfavicongenerator	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Favicon by RealFaviconGenerator",
          "vendor": "Unknown",
          "versions": [
            {
              "lessThanOrEqual": "1.3.20",
              "status": "affected",
              "version": "1.3.20",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "contact@wpscan.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:realfavicongenerator:favicon_by_realfavicongenerator:*:*:*:*:*:wordpress:*:*",
              "matchCriteriaId": "D60FFE29-D044-40DC-B69E-6192E65ABA6D",
              "versionEndExcluding": "1.3.22",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Favicon by RealFaviconGenerator WordPress plugin through 1.3.20 does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator."
    },
    {
      "lang": "es",
      "value": "El plugin de WordPress Favicon by RealFaviconGenerator versiones hasta 1.3.20, no sanea ni escapa de uno de sus par\u00e1metros antes de devolverlo a la respuesta, conllevando a un problema de tipo Cross-Site Scripting (XSS) Reflejado que se ejecuta en el contexto de un administrador conectado."
    }
  ],
  "id": "CVE-2021-24437",
  "lastModified": "2026-06-17T03:40:01.563",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "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": "2021-08-30T15:15:07.400",
  "references": [
    {
      "source": "contact@wpscan.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9"
    }
  ],
  "sourceIdentifier": "contact@wpscan.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "contact@wpscan.com",
      "type": "Secondary"
    }
  ]
}

CVE-2021-24437 (GCVE-0-2021-24437)

Vulnerability from cvelistv5 – Published: 2021-08-30 14:11 – Updated: 2024-08-03 19:28

Title

Favicon by RealFaviconGenerator <= 1.3.20 - Reflected Cross-Site Scripting (XSS)

Summary

Severity

No CVSS data available.

CWE

CWE-79 - Cross-site Scripting (XSS)

Assigner

WPScan mitre root

References

1 reference

URL	Tags
https://wpscan.com/vulnerability/ed9d26be-cc96-42…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Unknown	Favicon by RealFaviconGenerator	Affected: 1.3.20 , ≤ 1.3.20 (custom)

Credits

renniepak

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T19:28:24.007Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Favicon by RealFaviconGenerator",
          "vendor": "Unknown",
          "versions": [
            {
              "lessThanOrEqual": "1.3.20",
              "status": "affected",
              "version": "1.3.20",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "renniepak"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Favicon by RealFaviconGenerator WordPress plugin through 1.3.20 does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Cross-site Scripting (XSS)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-30T14:11:18.000Z",
        "orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
        "shortName": "WPScan"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Favicon by RealFaviconGenerator \u003c= 1.3.20 - Reflected Cross-Site Scripting (XSS)",
      "x_generator": "WPScan CVE Generator",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "contact@wpscan.com",
          "ID": "CVE-2021-24437",
          "STATE": "PUBLIC",
          "TITLE": "Favicon by RealFaviconGenerator \u003c= 1.3.20 - Reflected Cross-Site Scripting (XSS)"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Favicon by RealFaviconGenerator",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_name": "1.3.20",
                            "version_value": "1.3.20"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Unknown"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "renniepak"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The Favicon by RealFaviconGenerator WordPress plugin through 1.3.20 does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator."
            }
          ]
        },
        "generator": "WPScan CVE Generator",
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-79 Cross-site Scripting (XSS)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9",
              "refsource": "MISC",
              "url": "https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9"
            }
          ]
        },
        "source": {
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
    "assignerShortName": "WPScan",
    "cveId": "CVE-2021-24437",
    "datePublished": "2021-08-30T14:11:18.000Z",
    "dateReserved": "2021-01-14T00:00:00.000Z",
    "dateUpdated": "2024-08-03T19:28:24.007Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.