Improper handling of HTML-like comments in script contexts in html/template
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.
- BDU:2024-07762
- ALSA-2023:7762
- ALSA-2023:7764
- ALSA-2023:7765
- ALSA-2023:7766
- ALSA-2024:0121
- ALSA-2024:2160
- GO-2023-2041
- openSUSE-SU-2023:0360-1
- openSUSE-SU-2024:13216-1
- openSUSE-SU-2024:13217-1
- RHBA-2023:6364
- RHBA-2023:6928
- RHSA-2023:5008
- RHSA-2023:5009
- RHSA-2023:6840
- RHSA-2023:7762
- RHSA-2023:7764
- RHSA-2023:7765
- RHSA-2023:7766
- Published
- Sep 8, 2023
- Updated
- Jun 17, 2026
- EPSS
- 0.9% · 59th percentile
- CWE
- CWE-79
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Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 24 / 40 · 6.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.9%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| golang | go | cpe:2.3:a:golang:go |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- golang gobefore 1.20.8
- golang go1.21.0 and later · before 1.21.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Go). Independent of NVD's CPE analysis and usually ahead of it.
Go standard library html/template
- before 1.20.8affected · semver
- 1.21.0-0 and later · before 1.21.1affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | aardvark-dns | before 2:1.0.1-38.module_el8.9.0+3627+db8ec155 | 2:1.0.1-38.module_el8.9.0+3627+db8ec155 |
| AlmaLinux:8 | buildah | before 1:1.24.6-7.module_el8.9.0+3627+db8ec155 | 1:1.24.6-7.module_el8.9.0+3627+db8ec155 |
| AlmaLinux:8 | buildah-tests | before 1:1.24.6-7.module_el8.9.0+3687+dcd7ef8f | 1:1.24.6-7.module_el8.9.0+3687+dcd7ef8f |
| AlmaLinux:8 | buildah-tests | before 1:1.24.6-7.module_el8.9.0+3627+db8ec155 | 1:1.24.6-7.module_el8.9.0+3627+db8ec155 |
| AlmaLinux:8 | cockpit-podman | before 46-1.module_el8.7.0+3344+5bcd850f | 46-1.module_el8.7.0+3344+5bcd850f |
| AlmaLinux:8 | conmon | before 2:2.1.4-2.module_el8.9.0+3687+dcd7ef8f | 2:2.1.4-2.module_el8.9.0+3687+dcd7ef8f |
| AlmaLinux:8 | conmon | before 2:2.1.4-2.module_el8.9.0+3627+db8ec155 | 2:2.1.4-2.module_el8.9.0+3627+db8ec155 |
| AlmaLinux:8 | container-selinux | before 2:2.205.0-3.module_el8.9.0+3627+db8ec155 | 2:2.205.0-3.module_el8.9.0+3627+db8ec155 |
| AlmaLinux:8 | containernetworking-plugins | before 1:1.1.1-6.module_el8.9.0+3711+04fcca5e | 1:1.1.1-6.module_el8.9.0+3711+04fcca5e |
| AlmaLinux:8 | containers-common | before 2:1-38.module_el8.9.0+3627+db8ec155 | 2:1-38.module_el8.9.0+3627+db8ec155 |
| AlmaLinux:8 | crit | before 3.15-3.module_el8.6.0+2877+8e437bf5 | 3.15-3.module_el8.6.0+2877+8e437bf5 |
| AlmaLinux:8 | crit | before 3.15-3.module_el8.6.0+3137+d33c3efb | 3.15-3.module_el8.6.0+3137+d33c3efb |
| AlmaLinux:8 | criu | before 3.15-3.module_el8.6.0+2877+8e437bf5 | 3.15-3.module_el8.6.0+2877+8e437bf5 |
| AlmaLinux:8 | criu | before 3.15-3.module_el8.6.0+3137+d33c3efb | 3.15-3.module_el8.6.0+3137+d33c3efb |
| AlmaLinux:8 | criu-devel | before 3.15-3.module_el8.6.0+3137+d33c3efb | 3.15-3.module_el8.6.0+3137+d33c3efb |
| AlmaLinux:8 | criu-devel | before 3.15-3.module_el8.6.0+2877+8e437bf5 | 3.15-3.module_el8.6.0+2877+8e437bf5 |
| AlmaLinux:8 | criu-libs | before 3.15-3.module_el8.6.0+3137+d33c3efb | 3.15-3.module_el8.6.0+3137+d33c3efb |
| AlmaLinux:8 | criu-libs | before 3.15-3.module_el8.6.0+2877+8e437bf5 | 3.15-3.module_el8.6.0+2877+8e437bf5 |
| AlmaLinux:8 | crun | before 1.8.7-1.module_el8.9.0+3683+33eb0feb | 1.8.7-1.module_el8.9.0+3683+33eb0feb |
| AlmaLinux:8 | fuse-overlayfs | before 1.9-2.module_el8.9.0+3627+db8ec155 | 1.9-2.module_el8.9.0+3627+db8ec155 |
| AlmaLinux:8 | libslirp | before 4.4.0-1.module_el8.6.0+2877+8e437bf5 | 4.4.0-1.module_el8.6.0+2877+8e437bf5 |
| AlmaLinux:8 | libslirp | before 4.4.0-1.module_el8.6.0+3137+d33c3efb | 4.4.0-1.module_el8.6.0+3137+d33c3efb |
| AlmaLinux:8 | libslirp-devel | before 4.4.0-1.module_el8.6.0+2877+8e437bf5 | 4.4.0-1.module_el8.6.0+2877+8e437bf5 |
| AlmaLinux:8 | libslirp-devel | before 4.4.0-1.module_el8.6.0+3137+d33c3efb | 4.4.0-1.module_el8.6.0+3137+d33c3efb |
+96
Same product
golang: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-7187The "go get" implementation in Go 1.9.4, when the -insecure command-line option is used, does not validate the import path (get/vcs.go only 54Plan
- CVE-2018-16873In Go before 1.10.6 and 1.11.x before 1.11.3, the "go get" command is vulnerable to remote code execution when executed with the -u flag and52Plan
- CVE-2021-38297Go before 1.16.9 and 1.17.x before 1.17.2 has a Buffer Overflow via large arguments in a function invocation from a WASM module, when GOARCH42Plan
- CVE-2019-14809net/url in Go before 1.11.13 and 1.12.x before 1.12.8 mishandles malformed hosts in URLs, leading to an authorization bypass in some applica42Plan
- CVE-2015-5739The net/http library in net/textproto/reader.go in Go before 1.4.3 does not properly parse HTTP header keys, which allows remote attackers t42Plan
- CVE-2017-15041Go before 1.8.4 and 1.9.x before 1.9.1 allows "go get" remote command execution.42Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Go standard library html/template | 1.20.8 | Vendor (CNA) |
| Go standard library html/template | 1.21.1 | Vendor (CNA) |
| almalinux:aardvark-dns | 2:1.0.1-38.module_el8.9.0+3627+db8ec155 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:buildah | 1:1.31.3-2.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:buildah-tests | 1:1.31.3-2.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:containernetworking-plugins | 1:1.3.0-6.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:podman | 2:4.6.1-7.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:podman-docker | 2:4.6.1-7.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:podman-gvproxy | 2:4.6.1-7.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:podman-plugins | 2:4.6.1-7.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:podman-remote | 2:4.6.1-7.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:podman-tests | 2:4.6.1-7.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:skopeo | 2:1.13.3-3.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:skopeo-tests | 2:1.13.3-3.el9_3 · AlmaLinux:9 | Package registry (OSV) |
| Go:stdlib | 1.20.8 | Package registry (OSV) |
| Go:stdlib | 1.21.1 | Package registry (OSV) |
| opensuse:go1.20 | 1.20.8-150000.1.23.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:go1.20-openssl | 1.20.8.1-150000.1.11.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:go1.21 | 1.21.1-150000.1.6.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:go1.21-openssl | 1.21.4.1-150000.1.5.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| red hat:delve | 0:1.20.2-1.module+el8.9.0+18926+5193682d · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:delve-debuginfo | 0:1.20.2-1.module+el8.9.0+18926+5193682d · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:delve-debugsource | 0:1.20.2-1.module+el8.9.0+18926+5193682d · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:go-toolset | 0:1.20.10-1.el9_3 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:golang | 0:1.20.10-1.el9_3 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:golang-bin | 0:1.20.10-1.el9_3 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:golang-docs | 0:1.20.10-1.el9_3 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:golang-misc | 0:1.20.10-1.el9_3 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:golang-src | 0:1.20.10-1.el9_3 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:golang-tests | 0:1.20.10-1.el9_3 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
+19
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-23-0646 · Nov 20, 2023(SUSE Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvd-primary
Root cause
User content is inserted into the page as HTML. The browser interprets the content as code rather than data.
The bug in code
The whole CWE-79 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
commentEl.innerHTML = comment.body;Fixed
commentEl.textContent = comment.body;Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- go.dev/cl/526156
- go.dev/issue/62196
- groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJ
- pkg.go.dev/vuln/GO-2023-2041
- security.gentoo.org/glsa/202311-09
- security.netapp.com/advisory/ntap-20231020-0009/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.