GHSA-J3J5-5M8V-7GVC

Vulnerability from github – Published: 2026-06-10 00:31 – Updated: 2026-08-12 18:47
VLAI
Summary
BuddyPress: Authenticated attackers can access arbitrary private message threads via user_id request parameter
Details

BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.

Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "buddypress/buddypress"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "14.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-53673"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-12T18:47:41Z",
    "nvd_published_at": "2026-06-10T00:16:55Z",
    "severity": "HIGH"
  },
  "details": "BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user\u0027s identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user\u0027s private messages.",
  "id": "GHSA-j3j5-5m8v-7gvc",
  "modified": "2026-08-12T18:47:41Z",
  "published": "2026-06-10T00:31:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53673"
    },
    {
      "type": "WEB",
      "url": "https://github.com/buddypress/buddypress/commit/27d41e9749a878103b3a673b37dfc92b7f8f2cb7"
    },
    {
      "type": "WEB",
      "url": "https://buddypress.org"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/buddypress/BuddyPress"
    },
    {
      "type": "WEB",
      "url": "https://wordpress.org/plugins/buddypress"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/buddypress-private-message-idor-via-rest-api-user-id-parameter"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "BuddyPress: Authenticated attackers can access arbitrary private message threads via user_id request parameter"
}



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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

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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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  • 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.


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