id: GO-2023-2041
modules:
    - module: std
      versions:
        - fixed: 1.20.8
        - introduced: 1.21.0-0
          fixed: 1.21.1
      vulnerable_at: 1.21.0
      packages:
        - package: html/template
          symbols:
            - isComment
            - escaper.escapeText
            - tJS
            - tLineCmt
          derived_symbols:
            - Template.Execute
            - Template.ExecuteTemplate
summary: Improper handling of HTML-like comments in script contexts in html/template
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.
credits:
    - Takeshi Kaneko (GMO Cybersecurity by Ierae, Inc.)
references:
    - report: https://go.dev/issue/62196
    - fix: https://go.dev/cl/526156
    - web: https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJ
cve_metadata:
    id: CVE-2023-39318
    cwe: 'CWE-79: Improper Neutralization of Input During Web Page Generation (''Cross-site Scripting'')'
    references:
        - https://security.netapp.com/advisory/ntap-20231020-0009/
        - https://security.gentoo.org/glsa/202311-09