FKIE_CVE-2026-3367

Vulnerability from fkie_nvd - Published: 2026-07-11 04:17 - Updated: 2026-07-13 16:59
Severity
4.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Summary
The Lockme OAuth2 calendars integration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'App ID' setting in all versions up to, and including, 2.11.0. This is due to insufficient input sanitization and output escaping. The register_setting() call on line 197 lacks a sanitize callback, allowing unsanitized data to be stored via update_option(). When the settings page is rendered, the stored value is echoed directly into an HTML input's value attribute without esc_attr() on line 212. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in the settings page that will execute whenever a user accesses the plugin settings page. Multiple fields are affected: App ID (client_id), App Secret (client_secret), Bookings ID prefix (id_prefix), and API domain (api_domain). This vulnerability is particularly impactful in WordPress multisite installations where administrators of individual sites should not be able to execute JavaScript affecting other users.
References
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L197
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L212
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L223
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L245
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L256
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L54
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L197
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L212
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L223
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L245
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L256
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L54
security@wordfence.comhttps://plugins.trac.wordpress.org/changeset?reponame=&old=3495564%40lockme-calendars-integration&new=3495564%40lockme-calendars-integration
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/800b1a44-4173-4b8e-bc69-9a64218e64d6?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Lockme calendars integration",
          "vendor": "lustmored",
          "versions": [
            {
              "lessThanOrEqual": "2.11.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Lockme OAuth2 calendars integration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027App ID\u0027 setting in all versions up to, and including, 2.11.0. This is due to insufficient input sanitization and output escaping. The register_setting() call on line 197 lacks a sanitize callback, allowing unsanitized data to be stored via update_option(). When the settings page is rendered, the stored value is echoed directly into an HTML input\u0027s value attribute without esc_attr() on line 212. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in the settings page that will execute whenever a user accesses the plugin settings page. Multiple fields are affected: App ID (client_id), App Secret (client_secret), Bookings ID prefix (id_prefix), and API domain (api_domain). This vulnerability is particularly impactful in WordPress multisite installations where administrators of individual sites should not be able to execute JavaScript affecting other users."
    }
  ],
  "id": "CVE-2026-3367",
  "lastModified": "2026-07-13T16:59:13.647",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 2.7,
        "source": "security@wordfence.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-3367",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-13T14:26:42.291926Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-11T04:17:23.670",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L197"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L212"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L223"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L245"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L256"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L54"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L197"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L212"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L223"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L245"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L256"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L54"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3495564%40lockme-calendars-integration\u0026new=3495564%40lockme-calendars-integration"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/800b1a44-4173-4b8e-bc69-9a64218e64d6?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}



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