CVE-2023-28447: smarty Cross-site Scripting vulnerability in Javascript escaping

high Affects smarty/smarty. Feed 2026.10.29.1, updated 2026-10-28; published 2023-03-29; advisory modified 2025-11-04.

smarty Cross-site Scripting vulnerability in Javascript escaping

Package: smarty/smarty Composer
Affected versions: >=4.0.0 and <4.3.1 or <3.1.48 or >=4.0.0 and <4.1.1
Fixed in: 4.3.1, 3.1.48
Severity: high CVSS 7.1
Exploitation: not on CISA KEV · EPSS 1% (63.2th percentile)
Published: 2023-03-29
Source: osv.dev

References

CWE-79

NVD record smarty/smarty advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2021-26120 critical PHP Code Injection by malicious function name in smarty same package: smarty/smarty
CVE-2021-26119 high Sandbox escape through template_object in smarty same package: smarty/smarty
CVE-2022-29221 high PHP Code Injection by malicious block or filename in Smarty same package: smarty/smarty
CVE-2018-13982 high Smarty Path Traversal Vulnerability same package: smarty/smarty
CVE-2014-8350 high Smarty arbitrary PHP code execution same package: smarty/smarty
CVE-2017-1000480 critical Smarty PHP code injection same package: smarty/smarty