Bookly 23.2 - 28.2 - Bookly Administrator+ PHP Object Injection via Diagnostics Advanced Options

The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not prevent deserialization of untrusted input and does not correctly restrict a privileged maintenance feature to administrators, allowing users granted a custom booking-management capability, which an administrator must explicitly assign, to inject arbitrary PHP objects, overwrite privileged site options, and read stored integration secrets.

Problem type

CWE-502 Deserialization of Untrusted Data

Affected products

Unknown

Online Scheduling and Appointment Booking System

< 28.3 - AFFECTED

References

wpscan.com

https://wpscan.com/vulnerability/2150717e-7564-4b29-b2e7-362dd3b480c3/

exploitvdb-entrytechnical-description

GitHub Security Advisories

GHSA-ggx5-r53p-pf97

The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not...

https://github.com/advisories/GHSA-ggx5-r53p-pf97

nvd.nist.gov

https://nvd.nist.gov/vuln/detail/CVE-2026-86841

wpscan.com

https://wpscan.com/vulnerability/2150717e-7564-4b29-b2e7-362dd3b480c3

github.com

https://github.com/advisories/GHSA-ggx5-r53p-pf97

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-86841

Click to expand

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-86841",
    "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
    "assignerShortName": "WPScan",
    "dateUpdated": "2026-09-27T06:00:20.482Z",
    "dateReserved": "2026-09-08T14:44:08.802Z",
    "datePublished": "2026-09-27T06:00:20.482Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
        "shortName": "WPScan",
        "dateUpdated": "2026-09-27T06:00:20.482Z"
      },
      "title": "Bookly 23.2 - 28.2 - Bookly Administrator+ PHP Object Injection via Diagnostics Advanced Options",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Online Scheduling and Appointment Booking System  WordPress plugin before 28.3 does not prevent deserialization of untrusted input and does not correctly restrict a privileged maintenance feature to administrators, allowing users granted a custom booking-management capability, which an administrator must explicitly assign, to inject arbitrary PHP objects, overwrite privileged site options, and read stored integration secrets."
        }
      ],
      "affected": [
        {
          "vendor": "Unknown",
          "product": "Online Scheduling and Appointment Booking System",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "23.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "28.3"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-502 Deserialization of Untrusted Data",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://wpscan.com/vulnerability/2150717e-7564-4b29-b2e7-362dd3b480c3/",
          "tags": [
            "exploit",
            "vdb-entry",
            "technical-description"
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Muni Nitish Kumar Yaddala",
          "type": "finder"
        },
        {
          "lang": "en",
          "value": "WPScan",
          "type": "coordinator"
        }
      ]
    }
  }
}