GHSA-8H7G-4M22-X8GV

Vulnerability from github – Published: 2026-05-28 09:31 – Updated: 2026-05-28 09:31
VLAI
Details

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'append_where_sql' parameter in all versions up to, and including, 1.6.11.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The /appointments/bulk REST endpoint is reachable by unauthenticated attackers because its permission check accepts a public nonce that is embedded in the booking widget's frontend JavaScript (ssa.api.public_nonce) and visible to all site visitors; exploitation requires issuing the request as a PUT with an application/x-www-form-urlencoded body so that PHP's superglobals are not populated and the blocklist check silently passes.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-7797"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-89"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T08:16:37Z",
    "severity": "HIGH"
  },
  "details": "The Appointment Booking Calendar \u2014 Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to time-based blind SQL Injection via the \u0027append_where_sql\u0027 parameter in all versions up to, and including, 1.6.11.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The /appointments/bulk REST endpoint is reachable by unauthenticated attackers because its permission check accepts a public nonce that is embedded in the booking widget\u0027s frontend JavaScript (ssa.api.public_nonce) and visible to all site visitors; exploitation requires issuing the request as a PUT with an application/x-www-form-urlencoded body so that PHP\u0027s superglobals are not populated and the blocklist check silently passes.",
  "id": "GHSA-8h7g-4m22-x8gv",
  "modified": "2026-05-28T09:31:19Z",
  "published": "2026-05-28T09:31:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7797"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-api-model.php#L304"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-api-model.php#L361"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-db-model.php#L1049"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-api-model.php#L304"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-api-model.php#L361"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-db-model.php#L1049"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-api-model.php#L304"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-api-model.php#L361"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-db-model.php#L1049"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3549843/simply-schedule-appointments/tags/1.6.11.9/includes/lib/td-util/class-td-db-model.php"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/db3bddbd-44b0-4105-9039-0d669d643481?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.