GHSA-PW5X-2MF9-3XC8

Vulnerability from github – Published: 2026-05-11 19:39 – Updated: 2026-06-09 10:23
VLAI
Summary
MantisBT has a Private Bugnote Attachment Content Leak via REST API
Details

A missing authorization check in MantisBT's file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint.

Impact

  • REPORTER (access level 25) can view file attachments that were uploaded to private bugnotes by DEVELOPER/MANAGER/ADMIN users
  • Private bugnotes are intended for internal developer discussion; their attachments (logs, screenshots, patches) should be equally protected
  • The web UI is NOT affected — it filters through bugnote_get_all_visible_bugnotes() first

Patches

  • 029d9d203d9e4ae96b3e59d552fa7395cc1e5071

Workarounds

None

Credits

Thanks to the following security researchers for independently discovering and responsibly reporting the issue. - Vishal Shukla - Tristan Madani (@TristanInSec) from Talence Security - Tang Cheuk Hei (@siunam321)

This advisory's contents was largely copied from Tristan's well-written report.

Severity
7.2 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.28.1"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "mantisbt/mantisbt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.23.0"
            },
            {
              "fixed": "2.28.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42071"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-11T19:39:43Z",
    "nvd_published_at": "2026-05-28T21:16:30Z",
    "severity": "HIGH"
  },
  "details": "A missing authorization check in MantisBT\u0027s file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint.\n\n### Impact\n- REPORTER (access level 25) can view file attachments that were uploaded to private bugnotes by DEVELOPER/MANAGER/ADMIN users\n- Private bugnotes are intended for internal developer discussion; their attachments (logs, screenshots, patches) should be equally protected\n- The web UI is NOT affected \u2014 it filters through bugnote_get_all_visible_bugnotes() first\n\n### Patches\n- 029d9d203d9e4ae96b3e59d552fa7395cc1e5071\n\n### Workarounds\nNone\n\n### Credits\nThanks to the following security researchers for independently discovering and responsibly reporting the issue.\n- Vishal Shukla \n- Tristan Madani (@TristanInSec) from Talence Security \n- Tang Cheuk Hei (@siunam321) \n\nThis advisory\u0027s contents was largely copied from Tristan\u0027s well-written report.",
  "id": "GHSA-pw5x-2mf9-3xc8",
  "modified": "2026-06-09T10:23:52Z",
  "published": "2026-05-11T19:39:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mantisbt/mantisbt/security/advisories/GHSA-pw5x-2mf9-3xc8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42071"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mantisbt/mantisbt/commit/029d9d203d9e4ae96b3e59d552fa7395cc1e5071"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-xjmx-cprh-646r"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mantisbt/mantisbt"
    },
    {
      "type": "WEB",
      "url": "https://mantisbt.org/bugs/view.php?id=27039"
    },
    {
      "type": "WEB",
      "url": "https://mantisbt.org/bugs/view.php?id=36985"
    },
    {
      "type": "WEB",
      "url": "https://mantisbt.org/bugs/view.php?id=37092"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MantisBT has a Private Bugnote Attachment Content Leak via REST API"
}



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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

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.



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