How severe is CVE-2023-28447?

CVE-2023-28447 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-28447 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28447?

CVE-2023-28447 primarily affects Smarty. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-28447?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-28447 published?

CVE-2023-28447 was published on 2023-03-28 and last updated on 2026-06-17.

CVE-2023-28447

CVE-2023-28447 is a high-severity vulnerability in Smarty with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Smarty
Published: 2023-03-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-28447?: 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.
How severe is CVE-2023-28447?: CVE-2023-28447 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-28447 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28447?: CVE-2023-28447 primarily affects Smarty. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-28447?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-28447 published?: CVE-2023-28447 was published on 2023-03-28 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:smarty:smarty:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

More vulnerabilities in Smarty

CVE-2010-4727 — Critical (CVSS 10.0): Smarty before 3.0.0 beta 7 does not properly handle the <?php and ?> tags, which has unspecified impact and remote…
CVE-2010-4726 — Critical (CVSS 10.0): Unspecified vulnerability in the math plugin in Smarty before 3.0.0 RC1 has unknown impact and remote attack vectors.…
CVE-2010-4725 — Critical (CVSS 10.0): Smarty before 3.0.0 RC3 does not properly handle an on value of the asp_tags option in the php.ini file, which has…
CVE-2010-4724 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in the parser implementation in Smarty before 3.0.0 RC3 have unknown impact and…
CVE-2010-4722 — Critical (CVSS 10.0): Unspecified vulnerability in the fetch plugin in Smarty before 3.0.2 has unknown impact and remote attack vectors.
CVE-2009-5052 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in Smarty before 3.0.0 beta 6 have unknown impact and attack vectors.

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