GHSA-PQ86-J2C2-47F6

Vulnerability from github – Published: 2026-05-11 19:39 – Updated: 2026-05-11 19:39
VLAI
Summary
MantisBT: Authorization Bypass in Bugnote Editing via Issue Update API
Details

The mc_issue_update() function in MantisBT allows users having update_bug_threshold access (UPDATER, with default settings) to edit, change view state, and modify time tracking on bugnotes belonging to other users — bypassing the default DEVELOPER (level 55) threshold required by the dedicated mc_issue_note_update() function.

Impact

  1. UPDATER can edit notes by DEVELOPER/MANAGER/ADMIN — bypassing the DEVELOPER threshold
  2. UPDATER can change private notes to public — exposing confidential internal discussion
  3. UPDATER can change public notes to private — hiding information from reporters/viewers

Patches

  • 6e58fae4f22efdc3987f903c8ba2611de17a9435

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

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

Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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": "0"
            },
            {
              "fixed": "2.28.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42070"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-11T19:39:31Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "The mc_issue_update() function in MantisBT allows users having *update_bug_threshold* access (UPDATER, with default settings) to edit, change view state, and modify time tracking on bugnotes belonging to other users \u2014 bypassing the default DEVELOPER (level 55) threshold required by the dedicated mc_issue_note_update() function.\n\n### Impact\n1. UPDATER can edit notes by DEVELOPER/MANAGER/ADMIN \u2014 bypassing the DEVELOPER threshold\n2. UPDATER can change private notes to public \u2014 exposing confidential internal discussion\n3. UPDATER can change public notes to private \u2014 hiding information from reporters/viewers\n\n### Patches\n- 6e58fae4f22efdc3987f903c8ba2611de17a9435\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\nThis advisory\u0027s contents was largely copied from Tristan\u0027s well-written report.",
  "id": "GHSA-pq86-j2c2-47f6",
  "modified": "2026-05-11T19:39:31Z",
  "published": "2026-05-11T19:39:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mantisbt/mantisbt/security/advisories/GHSA-pq86-j2c2-47f6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mantisbt/mantisbt/commit/6e58fae4f22efdc3987f903c8ba2611de17a9435"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mantisbt/mantisbt"
    },
    {
      "type": "WEB",
      "url": "https://mantisbt.org/bugs/view.php?id=37089"
    },
    {
      "type": "WEB",
      "url": "https://mantisbt.org/bugs/view.php?id=37093"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MantisBT: Authorization Bypass in Bugnote Editing via Issue Update 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.


Detection rules are retrieved from Rulezet.