CVE-2026-81026 (GCVE-0-2026-81026)

Vulnerability from cvelistv5 – Published: 2026-08-29 06:00 – Updated: 2026-08-29 06:00
VLAI
Title
MasterStudy LMS < 3.7.40 - Unauthenticated Payment Bypass via PayPal IPN
Summary
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.40 does not verify the amount, receiver, currency or status of a payment notification before marking the corresponding order completed, allowing unauthenticated users to complete full-price orders and gain access to paid content by paying only a token amount.
Severity
No CVSS data available.
CWE
Assigner
References
URL Tags
https://wpscan.com/vulnerability/6677b55c-5d51-48… exploitvdb-entrytechnical-description
Impacted products
Vendor Product Version CPE status
Unknown MasterStudy LMS WordPress Plugin Affected: 0 , < 3.7.40 (semver)
guessed Create a notification for this product.
Credits
Abdullah Kareem WPScan
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "MasterStudy LMS WordPress Plugin",
          "vendor": "Unknown",
          "versions": [
            {
              "lessThan": "3.7.40",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Abdullah Kareem"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "WPScan"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.40 does not verify the amount, receiver, currency or status of a payment notification before marking the corresponding order completed, allowing unauthenticated users to complete full-price orders and gain access to paid content by paying only a token amount."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-284 Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:00:23.592Z",
        "orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
        "shortName": "WPScan"
      },
      "references": [
        {
          "tags": [
            "exploit",
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://wpscan.com/vulnerability/6677b55c-5d51-4849-ac67-849a500aefe2/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "MasterStudy LMS \u003c 3.7.40 - Unauthenticated Payment Bypass via PayPal IPN",
      "x_generator": {
        "engine": "WPScan CVE Generator"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
    "assignerShortName": "WPScan",
    "cveId": "CVE-2026-81026",
    "datePublished": "2026-08-29T06:00:23.592Z",
    "dateReserved": "2026-08-26T15:19:45.263Z",
    "dateUpdated": "2026-08-29T06:00:23.592Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-81026\",\"sourceIdentifier\":\"contact@wpscan.com\",\"published\":\"2026-08-29T06:17:55.990\",\"lastModified\":\"2026-08-29T06:17:55.990\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.40 does not verify the amount, receiver, currency or status of a payment notification before marking the corresponding order completed, allowing unauthenticated users to complete full-price orders and gain access to paid content by paying only a token amount.\"}],\"affected\":[{\"source\":\"contact@wpscan.com\",\"affectedData\":[{\"vendor\":\"Unknown\",\"product\":\"MasterStudy LMS WordPress Plugin\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"3.7.40\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://wpscan.com/vulnerability/6677b55c-5d51-4849-ac67-849a500aefe2/\",\"source\":\"contact@wpscan.com\"}]}}"
  }
}



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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.
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  • 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.