XSS in Golang Go
CVE-2023-39318
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (59.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.001
Affected products
- Golang Go
- Go Standard Library Html/template — versions 0, 1.21.0-0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- go.dev/issue/62196 (Issue Tracking)
- go.dev/cl/526156 (Patch)
- groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJ (Mailing List, Release Notes)
- pkg.go.dev/vuln/GO-2023-2041 (Vendor Advisory)
- security.netapp.com/advisory/ntap-20231020-0009/ (Third Party Advisory)
- security.gentoo.org/glsa/202311-09
Frequently asked questions
- What is CVE-2023-39318?
- CVE-2023-39318 is a medium-severity vulnerability in Golang Go, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-09-08.
- How severe is CVE-2023-39318?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2023-39318 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.