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CVE-2021-24357

Status: ModifiedMedium (5.4)—

In the Best Image Gallery & Responsive Photo Gallery – FooGallery WordPress plugin before 2.0.35, the Custom CSS field of each gallery is not properly sanitised or validated before being being output in the page where the gallery is embed, leading to a stored Cross-Site Scripting issue.

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)

Fooplugins — Foogallery

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2021-24357",
  "cveTags": [],
  "metrics": {
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        "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,
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        "userInteractionRequired": true
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    "cvssMetricV31": [
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        "cvssData": {
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          "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": "FooPlugins",
          "product": "Best Image Gallery & Responsive Photo Gallery – FooGallery",
          "versions": [
            {
              "status": "affected",
              "version": "2.0.35",
              "lessThan": "2.0.35",
              "versionType": "custom"
            }
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        }
      ]
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  ],
  "published": "2021-06-14T14:15:08.877",
  "references": [
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      "url": "https://wpscan.com/vulnerability/950f46ae-4476-4969-863a-0e55752953b3",
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        "Third Party Advisory"
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      "source": "contact@wpscan.com"
    },
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      "url": "https://wpscan.com/vulnerability/950f46ae-4476-4969-863a-0e55752953b3",
      "tags": [
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        "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": "In the Best Image Gallery & Responsive Photo Gallery – FooGallery WordPress plugin before 2.0.35, the Custom CSS field of each gallery is not properly sanitised or validated before being being output in the page where the gallery is embed, leading to a stored Cross-Site Scripting issue."
    },
    {
      "lang": "es",
      "value": "En el plugin de WordPress Best Image Gallery & Responsive Photo Gallery versiones anteriores a 2.0.35, el campo CSS personalizado de cada galería no es saneado o comprobado apropiadamente antes de aparecer en la página en la que la galería es insertada, conllevando a un problema de tipo Cross-Site Scripting almacenado"
    }
  ],
  "lastModified": "2026-06-17T03:39:53.423",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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              "versionEndExcluding": "2.0.35"
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          "operator": "OR"
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  "sourceIdentifier": "contact@wpscan.com"
}