Is CVE-2023-28447 in the CISA KEV catalog?

No. CVE-2023-28447 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-28447?

CVE-2023-28447 has a CVSS v3 base score of 7.1 (HIGH).

What is the EPSS score for CVE-2023-28447?

CVE-2023-28447 has an EPSS score of 1.03% (59th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-28447?

Upgrade smarty3 on debian 11 to 3.1.39-2+deb11u2 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2023-28447

HIGH

7.1

CVSS v3

NVD

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.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

smarty3Debian

Fixed in:3.1.39-2+deb11u2CVE-2023-28447

Fixed in:3.1.47-2+deb12u1CVE-2023-28447

Fixed in:3.1.48-1CVE-2023-28447

civicrmUbuntu

Fixed in:4.7.1+dfsg-2ubuntu1+esm1USN-8242-1

Fixed in:4.7.30+dfsg-1ubuntu1+esm1USN-8242-1

Fixed in:5.21.2+dfsg-1ubuntu0.1~esm1USN-8242-1

Fixed in:5.33.2+dfsg1-1ubuntu1+esm1USN-8242-1

civicrm-commonUbuntu

Fixed in:4.7.1+dfsg-2ubuntu1+esm1USN-8242-1

Fixed in:4.7.30+dfsg-1ubuntu1+esm1USN-8242-1

Fixed in:5.21.2+dfsg-1ubuntu0.1~esm1USN-8242-1

Fixed in:5.33.2+dfsg1-1ubuntu1+esm1USN-8242-1

postfixadminUbuntu

Fixed in:3.0.2-2ubuntu0.1~esm1USN-6550-1

Fixed in:3.2.1-3ubuntu0.1~esm1USN-6550-1

Fixed in:3.3.10-2ubuntu0.1~esm1USN-6550-1

Fixed in:3.3.13-1ubuntu0.1~esm1USN-8242-2

smarty3Ubuntu

Fixed in:3.1.21-1ubuntu1+esm2USN-8272-1

Fixed in:3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1+esm1USN-7158-1

Fixed in:3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1USN-7158-1

Fixed in:3.1.39-2ubuntu1.22.04.2USN-7158-1

Fixed in:3.1.48-1ubuntu0.24.04.1USN-7158-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

1.03%probability of exploitation in 30 days

59thpercentile

Moderate risk: more likely to be exploited than 59% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory4

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.