CVE-2023-39318 - CVE House

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Status published Unknown CVE-2023-39318

Improper handling of HTML-like comments in script contexts in html/template

0 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

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

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Takeshi Kaneko (GMO Cybersecurity by Ierae, Inc.)

References

More from Go standard library

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Unexpected session resumption in crypto/tls

Handshake messages may be processed at the incorrect encryption level in crypto/tls

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Excessive CPU consumption when building archive index in archive/zip

Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509

Affected Vendor

Go standard library

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Affected Software

html/template

Vulnerable Versions:

0, 1.21.0-0

Timeline

Official Publish: September 8th, 2023

Last Modified: February 13th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.