PHP Code Injection by malicious block or filename in Smarty

CVE-2022-29221 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

Template authors could inject php code by choosing a malicous {block} name or {include} file name. Sites that cannot fully trust template authors should update asap.

Patches

Please upgrade to the most recent version of Smarty v3 or v4.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

References

Are there any links users can visit to find out more?

For more information

If you have any questions or comments about this advisory:
* Open an issue in the Smarty repo

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2022-05-25 20:15:02 UTC
Updated
2023-01-27 05:02:44 UTC
GitHub reviewed
2022-05-25 20:15:02 UTC
NVD published
2022-05-24

EPSS Score

Score Percentile
25.50% 96.23%

CVSS Scores

Base score Version Severity Vector
8.8 3.1 —
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type Value
GHSA GHSA-634x-pc3q-cf4c ↗
CVE CVE-2022-29221 ↗

CWEs

CWE id Name
CWE-94 Improper Control of Generation of Code ('Code Injection')

Credits

  • altm4n (analyst)

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
composer smarty/smarty < 3.1.45 3.1.45 —
composer smarty/smarty >= 4.0.0, < 4.1.1 4.1.1 —

References

cvelogic Threat Intelligence