Improper Neutralization of Script in Attributes in @dcl/single-sign-on-client (CVE-2023-41049) | HOL Guard CVE

High · CVSS 7.5CVE-2023-41049GHSA-VP4F-WXGW-7X8X

Improper Neutralization of Script in Attributes in @dcl/single-sign-on-client

Answer in brief

CVE-2023-41049 records a High severity (CVSS 7.5) vulnerability in Improper Neutralization of Script in Attributes in @dcl/single-sign-on-client. The current sources do not mark it as known exploited. The current feed maps @dcl/single-sign-on-client (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2023Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps @dcl/single-sign-on-client (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
@dcl/single-sign-on-clientnpm	>=0 <0.1.0	0.1.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for @dcl/single-sign-on-client.
Review the reported fix. Update @dcl/single-sign-on-client to 0.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 4, 2023
Evidence: source:osv:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Upstream source description

### Impact Improper input validation in the `init` function allows arbitrary javascript to be executed using the `javascript:` prefix ```ts SSO.init('javascript:alert("javascript successfully injected")') ``` ### Patches This vulnerability was patched on version `0.1.0` ### Workarounds This vulnerability can be prevented if user input correctly sanitized or there is no user input pass to the `init` function

Quoted source text, attributed separately from HOL analysis.