CVE-2021-4074 (GCVE-0-2021-4074)

Vulnerability from cvelistv5 – Published: 2022-01-18 16:52 – Updated: 2025-02-14 17:47
VLAI
Title
WHMCS Bridge <= 6.1 Subscriber+ Stored Cross-Site Scripting
Summary
The WHMCS Bridge WordPress plugin is vulnerable to Stored Cross-Site Scripting via the cc_whmcs_bridge_url parameter found in the ~/whmcs-bridge/bridge_cp.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 6.1. Due to missing authorization checks on the cc_whmcs_bridge_add_admin function, low-level authenticated users such as subscribers can exploit this vulnerability.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-14 17:47 UTC
CWE
  • CWE-79 - Cross-site Scripting (XSS)
  • CWE-862 - Missing Authorization
References
Impacted products
Vendor Product Version CPE status
WHMCS Bridge WHMCS Bridge Affected: 6.1 , ≤ 6.1 (custom)
guessed Create a notification for this product.
Show details on NVD website

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                        }
                      ]
                    },
                    "vendor_name": "WHMCS Bridge"
                  }
                ]
              }
            },
            "credit": [
              {
                "lang": "eng",
                "value": "Kazuto Kokonoe, Tokyo Denki University Cryptography Laboratory"
              }
            ],
            "data_format": "MITRE",
            "data_type": "CVE",
            "data_version": "4.0",
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "The WHMCS Bridge WordPress plugin is vulnerable to Stored Cross-Site Scripting via the cc_whmcs_bridge_url parameter found in the ~/whmcs-bridge/bridge_cp.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 6.1. Due to missing authorization checks on the cc_whmcs_bridge_add_admin function, low-level authenticated users such as subscribers can exploit this vulnerability."
                }
              ]
            },
            "generator": {
              "engine": "Vulnogram 0.0.9"
            },
            "impact": {
              "cvss": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.4,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
                "version": "3.1"
              }
            },
            "problemtype": {
              "problemtype_data": [
                {
                  "description": [
                    {
                      "lang": "eng",
                      "value": "CWE-79 Cross-site Scripting (XSS)"
                    }
                  ]
                },
                {
                  "description": [
                    {
                      "lang": "eng",
                      "value": "CWE-862 Missing Authorization"
                    }
                  ]
                }
              ]
            },
            "references": {
              "reference_data": [
                {
                  "name": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4074",
                  "refsource": "MISC",
                  "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4074"
                },
                {
                  "name": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=2653041%40whmcs-bridge\u0026new=2653041%40whmcs-bridge\u0026sfp_email=\u0026sfph_mail=",
                  "refsource": "MISC",
                  "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=2653041%40whmcs-bridge\u0026new=2653041%40whmcs-bridge\u0026sfp_email=\u0026sfph_mail="
                }
              ]
            },
            "solution": [
              {
                "lang": "en",
                "value": "Update to version 6.3, or newer. "
              }
            ],
            "source": {
              "discovery": "EXTERNAL"
            }
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "assignerShortName": "Wordfence",
        "cveId": "CVE-2021-4074",
        "datePublished": "2022-01-18T16:52:27.000Z",
        "dateReserved": "2021-12-06T00:00:00.000Z",
        "dateUpdated": "2025-02-14T17:47:58.874Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.

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Detection rules are retrieved from Rulezet.

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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.


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