Reflected XSS when using flashMessages
Description
auth0-lock is Auth0's signin solution. Versions of nauth0-lock before and including 11.30.0 are vulnerable to reflected XSS. An attacker can execute arbitrary code when the library's flashMessage feature is utilized and user input or data from URL parameters is incorporated into the flashMessage or the library's languageDictionary feature is utilized and user input or data from URL parameters is incorporated into the languageDictionary. The vulnerability is patched in version 11.30.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
auth0-locknpm | < 11.30.1 | 11.30.1 |
Affected products
2Patches
Vulnerability mechanics
Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
5- github.com/advisories/GHSA-jr3j-whm4-9wwmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-32641ghsaADVISORY
- github.com/auth0/lock/commit/d139cf01c8234b07caf265e051f39d3eab08f7edghsax_refsource_MISCWEB
- github.com/auth0/lock/releases/tag/v11.30.1ghsax_refsource_MISCWEB
- github.com/auth0/lock/security/advisories/GHSA-jr3j-whm4-9wwmghsax_refsource_CONFIRMWEB
News mentions
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