CVE-2023-39318

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.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Trends

Current EPSS score: 0.09%• Percentile: 25%

Techniques & Countermeasures

• CWE-79•Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

  The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Affected Systems

• go standard library•html/template

  < 1.20.8 | ≥ 1.21.0-0, < 1.21.1

• golang•go

  < 1.20.8 | ≥ 1.21.0, < 1.21.1

• Go•stdlib

  ≥ 1.21.0-0, < 1.21.1

References (6)

• https://go.dev/issue/62196
• https://go.dev/cl/526156
• https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJ
• https://pkg.go.dev/vuln/GO-2023-2041
• https://security.netapp.com/advisory/ntap-20231020-0009/
• https://security.gentoo.org/glsa/202311-09