CVE-2023-39319

Name: CVE-2023-39319
Creator: NVD / NIST
Published: 2023-09-08T17:15:27.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2023-39319 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The html/template package does not apply the proper rules for handling occurrences of "<script", "<!--", and "</script" within JS literals in <script> contexts. This may cause the template parser to improperly consider script contexts to be terminated early, causing actions to be improperly escaped. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

The html/template package does not apply the proper rules for handling occurrences of "<script", "<!--", and "</script" within JS literals in <script> contexts. This may cause the template parser to improperly consider script contexts to be terminated early, causing actions to be improperly escaped. This could be leveraged to perform an XSS attack.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.79%

51.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Golang	Go	< 1.20.8
Golang	Go	>= 1.21.0, < 1.21.1

References

https://go.dev/cl/526157Patch
https://go.dev/issue/62197Issue Tracking
https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJRelease Notes
https://pkg.go.dev/vuln/GO-2023-2043Vendor Advisory
https://security.gentoo.org/glsa/202311-09
https://security.netapp.com/advisory/ntap-20231020-0009/Third Party Advisory
https://go.dev/cl/526157Patch
https://go.dev/issue/62197Issue Tracking
https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJRelease Notes
https://pkg.go.dev/vuln/GO-2023-2043Vendor Advisory
https://security.gentoo.org/glsa/202311-09
https://security.netapp.com/advisory/ntap-20231020-0009/Third Party Advisory

Timeline

Published: Sep 8, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-39319?

How severe is CVE-2023-39319?

CVE-2023-39319 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39319?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-39319?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST