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CVE-2021-24667

Status: ModifiedMedium (5.4)—

A stored cross-site scripting vulnerability has been discovered in : Simply Gallery Blocks with Lightbox (Version – 2.2.0 & below). The vulnerability exists in the Lightbox functionality where a user with low privileges is allowed to execute arbitrary script code within the context of the application. This vulnerability is due to insufficient validation of image parameters in meta data.

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)

Simplygallery — Simply Gallery Blocks With Lightbox

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-24667",
  "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": "Unknown",
          "product": "Gallery Blocks with Lightbox. Image Gallery, (HTML5 video , YouTube, Vimeo) Video Gallery and Lightbox for native gallery",
          "versions": [
            {
              "status": "affected",
              "version": "2.2.1",
              "lessThan": "2.2.1",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-08-30T15:15:07.847",
  "references": [
    {
      "url": "https://wpscan.com/vulnerability/5925b263-6d6f-4a03-a98a-620150dff8f7",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://www.fortiguard.com/zeroday/FG-VD-21-060",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://wpscan.com/vulnerability/5925b263-6d6f-4a03-a98a-620150dff8f7",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.fortiguard.com/zeroday/FG-VD-21-060",
      "tags": [
        "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": "A stored cross-site scripting vulnerability has been discovered in : Simply Gallery Blocks with Lightbox (Version – 2.2.0 & below). The vulnerability exists in the Lightbox functionality where a user with low privileges is allowed to execute arbitrary script code within the context of the application. This vulnerability is due to insufficient validation of image parameters in meta data."
    },
    {
      "lang": "es",
      "value": "Se ha detectado una vulnerabilidad de tipo cross-site scripting almacenado en : Simply Gallery Blocks with Lightbox (Versión - 2.2.0 y por debajo). La vulnerabilidad se presenta en la funcionalidad Lightbox, donde un usuario con bajos privilegios tiene permitido ejecutar código script arbitrario dentro del contexto de la aplicación. Esta vulnerabilidad es debido a una comprobación insuficiente de los parámetros de las imágenes en los metadatos."
    }
  ],
  "lastModified": "2026-06-17T03:40:25.333",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:simplygallery:simply_gallery_blocks_with_lightbox:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AC8D9894-CC79-4983-A5E1-4822A5DD9FE2",
              "versionEndExcluding": "2.2.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "contact@wpscan.com"
}