---
id: CVE-2026-49273
aliases:
  - GHSA-v84x-qvhg-f36r
title: >-
  MantisBT: Remote Code Execution via eval() Class Hoisting in
  adm_config_set.php
summary: >-
  MantisBT: Remote Code Execution via eval() Class Hoisting in
  adm_config_set.php
severity: high
cwe:
  - CWE-95
vendor: mantisbt
product: mantisbt/mantisbt
ecosystem: composer
affected:
  - 'mantisbt/mantisbt >= 1.3.0, <= 2.28.3'
patched:
  - mantisbt/mantisbt 2.28.4
published: '2026-07-15'
updated: '2026-07-15'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-v84x-qvhg-f36r'
references:
  - url: >-
      https://github.com/mantisbt/mantisbt/security/advisories/GHSA-v84x-qvhg-f36r
  - url: >-
      https://github.com/mantisbt/mantisbt/commit/78c0af63d1fe0118004744cab21ca3bf2cea0f5c
  - url: 'https://mantisbt.org/bugs/view.php?id=37122'
  - url: 'https://github.com/advisories/GHSA-v84x-qvhg-f36r'
tags:
  - ghsa
  - composer
ingestedAt: '2026-07-15T17:44:34.628Z'
---

## Overview

MantisBT 2.28.3 and earlier contains a remote code execution vulnerability in the admin "Manage Configuration" feature (adm_config_set.php). When setting a configuration value with a non-string type (integer, float, complex), the value is passed through ConfigParser -> Tokenizer, which calls *eval()* with a `return;` prefix intended to prevent code execution.

However, PHP hoists function and class declarations at compile time, even past a *return* statement. An attacker can define a class in the eval()'d code that hijacks a class loaded later via PHP's autoloader, achieving arbitrary code execution.

This vulnerability requires administrator access to the web UI (adm_config_set.php). The REST API's ConfigsSetCommand does NOT use Tokenizer/eval() and is not affected.

### Impact
- Remote code execution as the web server user (www-data) from an authenticated administrator session

### Patches
- https://github.com/mantisbt/mantisbt/commit/78c0af63d1fe0118004744cab21ca3bf2cea0f5c

### Workarounds
None. 

### Resources
- https://mantisbt.org/bugs/view.php?id=37122

### Credits
McCaulay Hudson (@_McCaulay) of watchTowr

## Affected packages

- `mantisbt/mantisbt >= 1.3.0, <= 2.28.3`

## Remediation

Upgrade to a patched release:

- `mantisbt/mantisbt 2.28.4`