CVE-2023-39318

Name: CVE-2023-39318
Creator: NVD / NIST
Published: 2023-09-08T17:15:27.823+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2023-39318 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The html/template package does not properly handle HTML-like "" comment tokens, nor hashbang "#!" comment tokens, in <script> contexts. This may cause the template parser to improperly interpret the contents of <script> contexts, causing actions to be improperly escaped. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

The html/template package does not properly handle HTML-like "" comment tokens, nor hashbang "#!" comment tokens, in <script> contexts. This may cause the template parser to improperly interpret the contents of <script> contexts, causing actions to be improperly escaped. This may 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

0.81%

52.2th 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/526156Patch
https://go.dev/issue/62196Issue Tracking
https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJMailing List, Release Notes
https://pkg.go.dev/vuln/GO-2023-2041Vendor Advisory
https://security.gentoo.org/glsa/202311-09
https://security.netapp.com/advisory/ntap-20231020-0009/Third Party Advisory
https://go.dev/cl/526156Patch
https://go.dev/issue/62196Issue Tracking
https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJMailing List, Release Notes
https://pkg.go.dev/vuln/GO-2023-2041Vendor 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-2023-39318?

How severe is CVE-2023-39318?

CVE-2023-39318 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39318?

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-2023-39318?

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

Scan your code now

Source: NVD / NIST