Improper handling of JavaScript whitespace in html/template
CVE-2023-24540

9.8CRITICAL

Key Information:

Vendor

Go Standard Library

Status
Html/template
Vendor
CVE Published:
11 May 2023

What is CVE-2023-24540?

The vulnerability involves a failure to recognize certain valid JavaScript whitespace characters in the Go programming language. This oversight can lead to improper sanitization of templates containing these characters within execution contexts that involve actions. Developers using Go may find that the presence of whitespace characters outside of the expected set can result in security risks, highlighting the importance of rigorous input validation to ensure safe template processing.

Affected Version(s)

html/template 0 < 1.19.9

html/template 1.20.0-0 < 1.20.4

References

https://go.dev/issue/59721
https://go.dev/cl/491616
https://groups.google.com/g/golang-announce/c/MEb0UyuSMsU

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Juho Nurminen of Mattermost
.