FKIE_CVE-2021-39357

Vulnerability from fkie_nvd - Published: 2021-10-21 20:15 - Updated: 2024-11-21 06:19
Severity ?
5.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Summary
The Leaky Paywall WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via the ~/class.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 4.16.5. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.
References
security@wordfence.comhttps://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.mdExploit, Third Party Advisory
security@wordfence.comhttps://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.phpPatch, Third Party Advisory
security@wordfence.comhttps://wordfence.com/vulnerability-advisories/#CVE-2021-39357Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.mdExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.phpPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://wordfence.com/vulnerability-advisories/#CVE-2021-39357Third Party Advisory
Impacted products
Vendor Product Version
zeen101 leaky_paywall *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:zeen101:leaky_paywall:*:*:*:*:*:wordpress:*:*",
              "matchCriteriaId": "B192FC1B-F26C-487D-B008-15F497D53F49",
              "versionEndIncluding": "4.16.5",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Leaky Paywall WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via the ~/class.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 4.16.5. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled."
    },
    {
      "lang": "es",
      "value": "El plugin Leaky Paywall de WordPress es vulnerable a un ataque de tipo Cross-Site Scripting Almacenado debido a una comprobaci\u00f3n insuficiente y saneo de entradas por medio del archivo ~/class.php, que permite a atacantes con acceso de usuario administrativo inyectar scripts web arbitrarios, en versiones hasta la 4.16.5 incluy\u00e9ndola. Esto afecta a las instalaciones multisitio en las que unfiltered_html est\u00e1 deshabilitado para los administradores, y los sitios en los que unfiltered_html est\u00e1 deshabilitado"
    }
  ],
  "id": "CVE-2021-39357",
  "lastModified": "2024-11-21T06:19:23.977",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 6.8,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7,
        "source": "security@wordfence.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.7,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-10-21T20:15:08.260",
  "references": [
    {
      "source": "security@wordfence.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.md"
    },
    {
      "source": "security@wordfence.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.php"
    },
    {
      "source": "security@wordfence.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://wordfence.com/vulnerability-advisories/#CVE-2021-39357"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.md"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.php"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://wordfence.com/vulnerability-advisories/#CVE-2021-39357"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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