Improper Control of Generation of Code in PrestaAddons - M4 PDF Extensions module for PrestaShop
In the module “M4 PDF Extensions” (m4pdf) up to version 3.3.2 from PrestaAddons for PrestaShop, a guest can perform PHP code injection in affected versions.
The method M4PDF::saveTemplate() has sensitive action that can be executed with a trivial http call and exploited to forge a Code injection.
Note : A useless predictable token protect these methods.
This exploit uses a PrestaShop front controller and most attackers can conceal the module controller’s path during the exploit, so you will never know within your conventional frontend logs that it exploits this vulnerability. You will only see “POST /” inside your conventional frontend logs. Activating the AuditEngine of mod_security (or similar) is the only way to get data to confirm this exploit.
WARNING : The module still own sensitive to critical issues because author refuse to update its logical authentication flaw, you should consider to delete it or put its front controller under IP restriction, if you do so, you must be aware of this.
Edit 2024-09-10 - WARNING : This exploit is actively used to deploy webskimmer to massively steal credit cards. Since POC is now exploited, it is considered public.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| PrestaShop module | m4pdf | <= 3.3.1 <= 3.3.1 (3.3.2 fixed the vulnerability - see WARNING below) |
3.3.2 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-94- Platform
- PrestaShop
- Package
m4pdf- Disclosed
- 20.06.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
Friends-Of-Presta - CVE-2023-50029 - MIT
MIT
The MIT License (MIT) Copyright (c) 2016-present Parker Moore and the minima contributors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Vulnerability history: m4pdf
All published vulnerabilities of this package (PrestaShop module), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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