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CVE-2021-4252

Estado: ModificadaMedia (6.1)—

A vulnerability, which was classified as problematic, has been found in WP-Ban. This issue affects the function toggle_checkbox of the file ban-options.php. The manipulation of the argument $_SERVER["HTTP_USER_AGENT"] leads to cross site scripting. The attack may be initiated remotely. The name of the patch is 13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76. It is recommended to apply a patch to fix this issue. The identifier VDB-216209 was assigned to this vulnerability.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Wp-ban Project — Wp-ban

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-4252",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-4252",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-14T17:02:13.725798Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cna@vuldb.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 3.5,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
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          "confidentialityImpact": "LOW"
        },
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        "exploitabilityScore": 2.8
      }
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  "affected": [
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          "versions": [
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  "published": "2022-12-18T22:15:10.243",
  "references": [
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      "url": "https://github.com/lesterchan/wp-ban/commit/13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76",
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    {
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cna@vuldb.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-707"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability, which was classified as problematic, has been found in WP-Ban. This issue affects the function toggle_checkbox of the file ban-options.php. The manipulation of the argument $_SERVER[\"HTTP_USER_AGENT\"] leads to cross site scripting. The attack may be initiated remotely. The name of the patch is 13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76. It is recommended to apply a patch to fix this issue. The identifier VDB-216209 was assigned to this vulnerability."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad fue encontrada en WP-Ban y clasificada como problemática. Este problema afecta la función toggle_checkbox del archivo ban-options.php. La manipulación del argumento $_SERVER[\"HTTP_USER_AGENT\"] conduce a Cross-Site Scripting. El ataque puede iniciarse de forma remota. El nombre del parche es 13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76. Se recomienda aplicar un parche para solucionar este problema. A esta vulnerabilidad se le asignó el identificador VDB-216209."
    }
  ],
  "lastModified": "2026-06-17T04:19:21.427",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wp-ban_project:wp-ban:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F064FEA7-220B-4644-91B7-4827ABFAF247",
              "versionEndExcluding": "2021-11-24"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cna@vuldb.com"
}