CVE-2023-24539 - CVE House
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Status published Unknown CVE-2023-24539

Improper sanitization of CSS values in html/template

Vulnerability Description

Angle brackets (<>) are not considered dangerous characters when inserted into CSS contexts. Templates containing multiple actions separated by a '/' character can result in unexpectedly closing the CSS context and allowing for injection of unexpected HTML, if executed with untrusted input.

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:

  • Juho Nurminen of Mattermost

References

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Affected Vendor

Go standard library

View all reports →

Affected Software

html/template
Vulnerable Versions:
0, 1.20.0-0

Timeline

Official Publish: May 11th, 2023
Last Modified: January 24th, 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.