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CVE-2023-39318— Improper handling of HTML-like comments in script contexts in html/template

Quick assessment

Affected
Go standard library html/template
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Golang是美国谷歌（Google）公司的一种静态强类型、编译型语言。Go的语法接近C语言，但对于变量的声明有所不同。Go支持垃圾回收功能。Go的并行模型是以东尼·霍尔的通信顺序进程（CSP）为基础，采取类似模型的其他语言包括Occam和Limbo，但它也具有Pi运算的特征，比如通道传输。在1.8版本中开放插件（Plugin）的支持，这意味着现在能从Go中动态加载部分函数。 Google Golang 存在跨站脚本漏洞，该漏洞源于无法正确处理类似HTML的注释标记，从而导致操作被错误地转义

AI Predicted 6.1 Difficulty: Easy EPSS 0.93% · P59

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2023-39318

Vulnerability Information
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Vulnerability Title
Improper handling of HTML-like comments in script contexts in html/template
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Golang 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Golang是美国谷歌（Google）公司的一种静态强类型、编译型语言。Go的语法接近C语言，但对于变量的声明有所不同。Go支持垃圾回收功能。Go的并行模型是以东尼·霍尔的通信顺序进程（CSP）为基础，采取类似模型的其他语言包括Occam和Limbo，但它也具有Pi运算的特征，比如通道传输。在1.8版本中开放插件（Plugin）的支持，这意味着现在能从Go中动态加载部分函数。 Google Golang 存在跨站脚本漏洞，该漏洞源于无法正确处理类似HTML的注释标记，从而导致操作被错误地转义
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Go standard library html/template 0 ~ 1.20.8 -

II. Public POCs for CVE-2023-39318

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III. Intelligence Information for CVE-2023-39318

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Vendor Advisories for CVE-2023-39318 (2)

Other References for CVE-2023-39318 (4)

Same Patch Batch · Go standard library · 2023-09-08 · 4 CVEs total

CVE-2023-39322 Memory exhaustion in QUIC connection handling in crypto/tls
CVE-2023-39321 Panic when processing post-handshake message on QUIC connections in crypto/tls
CVE-2023-39319 Improper handling of special tags within script contexts in html/template

IV. Related Vulnerabilities

Same product: html/template
Same vendor: Go standard library

V. Comments for CVE-2023-39318

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