CVE-2023-28447 - CVE House
Back to Database
Status published High CVE-2023-28447

Cross site scripting vulnerability in Javascript escaping in smarty/smarty

Vulnerability Description

Smarty is a template engine for PHP. In affected versions smarty did not properly escape javascript code. An attacker could exploit this vulnerability to execute arbitrary JavaScript code in the context of the user's browser session. This may lead to unauthorized access to sensitive user data, manipulation of the web application's behavior, or unauthorized actions performed on behalf of the user. Users are advised to upgrade to either version 3.1.48 or to 4.3.1 to resolve this issue. There are no known workarounds for this vulnerability.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2023-28447

Credits & Attribution

No credits recorded in the NVD database.

References

More from smarty-php

View All →
CVE-2024-35226
PHP Code Injection by malicious attribute in extends-tag in Smarty
High 7.3
CVE-2022-29221
PHP Code Injection by malicious block or filename in Smarty
High 8.8
CVE-2021-29454
Sandbox Escape by math function in smarty
High 8.1
CVE-2021-21408
Access to restricted PHP code by dynamic static class access in smarty
High 8.8

Affected Vendor

Affected Software

smarty
Vulnerable Versions:
>= 4.0.0, < 4.3.1, < 3.1.48

Timeline

Official Publish: March 28th, 2023
Last Modified: November 3rd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Weaknesses (CWE)

CWE-79

MITRE ATT&CK TTPs

T1189 Drive-by Compromise
Initial Access
T1059.007 JavaScript
Execution
T1539 Steal Web Session Cookie
Collection
T1213 Data from Information Repositories
Collection
T1567 Exfiltration Over Web Service
Exfiltration
T1491.001 Defacement
Impact