CVE-2026-49273 — mantisbt / mantisbt
Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')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
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A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
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