Advisory details:
github_osv / GHSA-v84x-qvhg-f36r
| Advisory ID | github_osv/GHSA-v84x-qvhg-f36r |
| Aliases |
CVE-2026-49273
|
| Summary | MantisBT: Remote Code Execution via eval() Class Hoisting in adm_config_set.php 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 |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 7.7 |
| Risk | 3.9 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv4 | 8.6 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-v84x-qvhg-f36r/GHSA-v84x-qvhg-f36r.json |
| generic_textual | HIGH |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
There are no SSVC decisions available.