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CVE-2021-24243

Status: ModifiedMedium (5.4)—

An AJAX action registered by the WPBakery Page Builder (Visual Composer) Clipboard WordPress plugin before 4.5.6 did not have capability checks nor sanitization, allowing low privilege users (subscriber+) to call it and set XSS payloads, which will be triggered in all backend pages.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Wpbakery Page Builder Clipboard Project — Wpbakery Page Builder Clipboard

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2021-24243",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "contact@wpscan.com",
      "affectedData": [
        {
          "vendor": "bitorbit",
          "product": "WPBakery Page Builder (Visual Composer) Clipboard",
          "versions": [
            {
              "status": "affected",
              "version": "4.5.0",
              "lessThan": "4.5.0*",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "4.5.6",
              "lessThan": "4.5.6",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-05-06T13:15:11.463",
  "references": [
    {
      "url": "https://codecanyon.net/item/visual-composer-clipboard/8897711",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://wpscan.com/vulnerability/3bc0733a-b949-40c9-a5fb-f56814fc4af3",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://codecanyon.net/item/visual-composer-clipboard/8897711",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://wpscan.com/vulnerability/3bc0733a-b949-40c9-a5fb-f56814fc4af3",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "contact@wpscan.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An AJAX action registered by the WPBakery Page Builder (Visual Composer) Clipboard WordPress plugin before 4.5.6 did not have capability checks nor sanitization, allowing low privilege users (subscriber+) to call it and set XSS payloads, which will be triggered in all backend pages."
    },
    {
      "lang": "es",
      "value": "Una acción AJAX registrada por el plugin WPBakery Page Builder (Visual Composer) Clipboard WordPress versiones anteriores a 4.5.6, no tenía capacidad de comprobación ni saneamiento, permitiendo a usuarios con privilegios bajos (suscriptor+) llamarlo y configurar cargas útiles XSS, que serán activadas en todas las páginas backend"
    }
  ],
  "lastModified": "2026-06-17T03:39:41.643",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wpbakery_page_builder_clipboard_project:wpbakery_page_builder_clipboard:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DA5DA268-C3CD-4D6E-A011-F7DB802030F5",
              "versionEndExcluding": "4.5.6",
              "versionStartIncluding": "4.5.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "contact@wpscan.com"
}