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MantisBT CVE-2026-52882

MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-07-15 https://github.com/mantisbt/mantisbt
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Severity by source

vuln.today AI
4.3 MEDIUM

Network-reachable, low-complexity bypass requiring an authenticated low-privilege account (PR:L); impact is integrity-only via version field manipulation with no confidentiality or availability consequence.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Estimated by vuln.today — no official severity rating has been published for this CVE yet.

Lifecycle Timeline

2
Source Code Evidence Fetched
Jul 15, 2026 - 19:02 vuln.today
Analysis Generated
Jul 15, 2026 - 19:02 vuln.today

DescriptionCVE.org

Impact

Users below _report_issues_for_unreleased_versions_threshold_ can assign unreleased product versions.

Patches

  • https://github.com/mantisbt/mantisbt/commit/17072d4c322c85f7135ebec3417a6d90b525d12f

Workarounds

None

Resources

  • https://mantisbt.org/bugs/view.php?id=37065

Credits

MantisBT thanks Vishal Shukla for discovering and responsibly reporting the issue.

AnalysisAI

Authorization bypass in MantisBT's SOAP API, REST API, and web-based bug update interface allows authenticated lower-privileged users to assign unreleased product versions to issues, circumventing the report_issues_for_unreleased_versions_threshold access control. All three issue-update pathways in versions 2.28.3 and earlier were unprotected: the SOAP handler (mc_issue_api.php), the web form (bug_update.php), and the REST command layer (IssueAddCommand.php). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate as low-privileged MantisBT user
Delivery
Identify unreleased product version via API or UI
Exploit
Submit issue update specifying unreleased version
Execution
Server omits threshold authorization check
Impact
Unreleased version recorded on issue

Vulnerability AssessmentAI

Exploitation Exploitation requires a valid MantisBT account with a privilege level below the `report_issues_for_unreleased_versions_threshold` configuration setting - meaning authenticated but lower-privileged users, not unauthenticated attackers. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment No CVSS vector or EPSS score is present in the input data; the following assessment is inferred from the description, CWE, and patch diff. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated MantisBT user with a privilege level below `report_issues_for_unreleased_versions_threshold` sends an issue-update request to the SOAP or REST API specifying an unreleased product version in the version field. On unpatched instances (2.28.3 and earlier), the server performs no authorization check against the threshold configuration and records the unreleased version assignment. …
Remediation Upgrade to MantisBT version 2.28.4 via Composer (`composer require mantisbt/mantisbt:^2.28.4`); this version introduces server-side authorization checks in the SOAP handler (`api/soap/mc_issue_api.php`), the web UI update script (`bug_update.php`), and the REST command layer (`core/commands/IssueAddCommand.php`). … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-52882 vulnerability details – vuln.today

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