Security readout for executives and security teams
Plain-English summary
Auth0 Lock versions 11.30.0 and earlier can expose sign-in pages to reflected cross-site scripting when applications place untrusted input, including URL parameter data, into flashMessage or languageDictionary. This can allow attacker-controlled script to run in a user's browser within the affected login flow. Auth0 patched the issue in 11.30.1.
Executive priority
Treat this as a high-priority web login component issue where Auth0 Lock is present. Prioritize internet-facing authentication flows first, especially where teams customize login messages or localization from request data.
Technical view
CVE-2021-32641 is CWE-79 in auth0-lock <=11.30.0. The affected paths are flashMessage and languageDictionary when user-controlled content is incorporated. The CVSS 3.1 score is 8.1 high, with network attack vector and high attack complexity. The cited fix is auth0-lock 11.30.1.
Likely exposure
Likely exposure is web applications embedding Auth0 Lock <=11.30.0 and dynamically populating flashMessage or languageDictionary from URL parameters or other untrusted input. Applications on newer Lock versions, or not using those features with untrusted data, are not shown affected by the provided sources.
Exploitation context
The bundle does not cite public exploitation, and KEV is false, so active exploitation is not established. Exploitability depends on both an affected Lock version and an application pattern that reflects untrusted data into the named UI features.
Researcher notes
Focus review on sink usage, not only package presence. The sources identify vulnerable behavior only when flashMessage or languageDictionary receives user input or URL-derived data. The patch reference is available, but this assessment does not infer details beyond the advisory.
Mitigation direction
- Upgrade auth0-lock to version 11.30.1 or later.
- Review login code using flashMessage or languageDictionary with URL parameters.
- Remove untrusted input from those fields until upgraded.
- Check Auth0 advisory and release notes for vendor guidance.
Validation and detection
- Inventory applications and packages using auth0-lock.
- Confirm deployed auth0-lock versions are above 11.30.0.
- Search code for flashMessage and languageDictionary usage.
- Verify URL parameter data is not passed into those features.
- Record affected routes and remediation status for each application.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-32641 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/auth0/lock/security/advisories/GHSA-jr3j-whm4-9wwmCVE reference · x_refsource_CONFIRM
- https://github.com/auth0/lock/commit/d139cf01c8234b07caf265e051f39d3eab08f7edCVE reference · x_refsource_MISC
- https://github.com/auth0/lock/releases/tag/v11.30.1CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.