CVE-2026-52883: MantisBT Injection Of TIME_TRACKING And REMINDER Vulnerability

MODERATE
Advisory Identifier: GHSA-4vpf-w7qv-5h3q
Share
CWE-20
Published
Advisory Summary

CVE-2026-52883 is a MODERATE injection of time_tracking and reminder vulnerability (CWE-20: Improper Input Validation) affecting MantisBT libraries in the Packagist ecosystem. The issue involves injection of time_tracking and reminder notes via rest and soap apis. Remediation is available by upgrading affected packages to version 2.28.4.

CVE-2026-52883 at a Glance

CVE Identifier CVE-2026-52883
GHSA Identifier GHSA-4vpf-w7qv-5h3q
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-20: Improper Input Validation
Affected Product MantisBT
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-52883

To remediate this vulnerability, upgrade all affected MantisBT dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mantisbt/mantisbt fixed: 2.28.4 
Upgrade mantisbt/mantisbt to 2.28.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for mantisbt/mantisbt

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-52883, inspect your project dependencies for MantisBT:

inspect dependencies for mantisbt/mantisbt

Analyze the terminal output to locate any version of MantisBT in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.28.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In MantisBT, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Unvalidated note_type Parameter in mc_issue_update SOAP Endpoint Allows creation of TIME_TRACKING and REMINDER Notes. The SOAP path passes the user-supplied note_type integer directly to bugnote_add() without validating that the user is authorized to create that type of note. If the user's access level is higher than *$g_time_tracking_view_threshold*, they can also inject arbitrary hours into billing reports. REST API also allows injection of TIME_TRACKING notes (but not REMINDER) through the same mc_issue_update() function. ### Impact An attacker with UPDATER access could: - Inject fake billable hours via TIME_TRACKING notes (note_type=2), corrupting billing data exported through MantisBT's billing reports. Organizations that bill clients based on MantisBT time tracking data would generate incorrect invoices, and corrupt time tracking reports could be used to drive project management decisions. - Fake REMINDER notes registered (but without actual sending of notifications). ### Patches - https://github.com/mantisbt/mantisbt/commit/de2f71fd88746e963386c214c3ae65a3c4c851b7 ### Workarounds None ### Resources - https://mantisbt.org/bugs/view.php?id=37081 - https://mantisbt.org/bugs/view.php?id=37200 ### Credits Thanks to the following security researchers for discovering and responsibly reporting the issue - Vishal Shukla - Psalms Christopher Matovu (@byteoverride)

CVE-2026-52883 Affected MantisBT Versions

1 component(s)
Fixed Versions:
2.28.4
Product / Package Ecosystem Affected Versions Fixed Version
mantisbt/mantisbt
 Packagist
< 2.28.4
2.28.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-4vpf-w7qv-5h3q
Security Fix Commit FIX COMMIT
https://github.com/mantisbt/mantisbt/commit/de2f71fd88746e963386c214c3ae65a3c4c851b7
MantisBT Source Repository REPOSITORY
https://github.com/mantisbt/mantisbt
MantisBT Security Information SECURITY
https://mantisbt.org/bugs/view.php?id=37081
MantisBT Security Information SECURITY
https://mantisbt.org/bugs/view.php?id=37200

Frequently Asked Questions

What is CVE-2026-52883?
CVE-2026-52883 is a security vulnerability in MantisBT involving Injection of TIME_TRACKING and REMINDER Notes via REST and SOAP APIs under CWE-20: Improper Input Validation.
Which MantisBT versions are affected?
Affected versions include releases prior to 2.28.4 across affected packages: mantisbt/mantisbt.
What version fixes CVE-2026-52883?
Upgrading to 2.28.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mantisbt/mantisbt affected?
Yes, mantisbt/mantisbt is affected in releases prior to 2.28.4. Upgrade your dependency to 2.28.4 or later.
What CWE is associated with CVE-2026-52883?
CVE-2026-52883 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Packagist dependencies for CVE-2026-52883?
Run the dependency tree command: 'inspect dependencies for mantisbt/mantisbt'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4vpf-w7qv-5h3q",
  "modified" : "2026-07-15T18:52:20Z",
  "published" : "2026-07-15T18:52:20Z",
  "aliases" : [ "CVE-2026-52883" ],
  "summary" : "MantisBT: Injection of TIME_TRACKING and REMINDER Notes via REST and SOAP APIs",
  "details" : "Unvalidated note_type Parameter in mc_issue_update SOAP Endpoint Allows creation of TIME_TRACKING and REMINDER Notes. The SOAP path passes the user-supplied note_type integer directly to bugnote_add() without validating that the user is authorized to create that type of note. If the user's access level is higher than *$g_time_tracking_view_threshold*, they can also inject arbitrary hours into billing reports.\n\nREST API also allows injection of TIME_TRACKING notes (but not REMINDER) through the same mc_issue_update() function.\n\n### Impact\nAn attacker with UPDATER access could:\n- Inject fake billable hours via TIME_TRACKING notes (note_type=2), corrupting billing data exported through MantisBT's billing reports. Organizations that bill clients based on MantisBT time tracking data would generate incorrect invoices, and corrupt time tracking reports could be used to drive project management decisions.\n- Fake REMINDER notes registered (but without actual sending of notifications).\n\n### Patches\n- https://github.com/mantisbt/mantisbt/commit/de2f71fd88746e963386c214c3ae65a3c4c851b7\n\n### Workarounds\nNone\n\n### Resources\n- https://mantisbt.org/bugs/view.php?id=37081\n- https://mantisbt.org/bugs/view.php?id=37200\n\n### Credits\nThanks to the following security researchers for discovering and responsibly reporting the issue\n- Vishal Shukla\n- Psalms Christopher Matovu (@byteoverride)",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "mantisbt/mantisbt"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.28.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.28.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mantisbt/mantisbt/security/advisories/GHSA-4vpf-w7qv-5h3q"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mantisbt/mantisbt/commit/de2f71fd88746e963386c214c3ae65a3c4c851b7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mantisbt/mantisbt"
  }, {
    "type" : "WEB",
    "url" : "https://mantisbt.org/bugs/view.php?id=37081"
  }, {
    "type" : "WEB",
    "url" : "https://mantisbt.org/bugs/view.php?id=37200"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-15T18:52:20Z",
    "nvd_published_at" : null
  }
}