GHSA-RFWW-46MR-4MRF

Vulnerability from github – Published: 2026-07-02 12:30 – Updated: 2026-07-02 12:30
VLAI
Details

The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the 'vcal' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-11896"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-02T10:16:27Z",
    "severity": "MODERATE"
  },
  "details": "The My Calendar \u2013 Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the \u0027vcal\u0027 parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata.",
  "id": "GHSA-rfww-46mr-4mrf",
  "modified": "2026-07-02T12:30:59Z",
  "published": "2026-07-02T12:30:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11896"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date-utilities.php#L417"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical.php#L26"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L212"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L246"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-events.php#L748"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.php#L209"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utilities.php#L417"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php#L26"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L212"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L246"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.php#L748"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php#L209"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3572191%40my-calendar\u0026new=3572191%40my-calendar\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30c-eb285f59d945?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.