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CVE-2021-32641

21
FAUCET Score

CVE-2021-32641 is a reflected Cross-Site Scripting (XSS) vulnerability affecting Auth0's sign-in solution, auth0-lock, in versions up to and including 11.30.0. This vulnerability allows an attacker to execute arbitrary code when user input from URL parameters is improperly incorporated into the library's flashMessage or languageDictionary features. Rated with a CVSS score of 6.1 (Medium), the attack requires user interaction (UI:R) and has low impact on confidentiality and integrity (C:L/I:L), with no impact on availability (A:N). The attack complexity is low (AC:L) and can be carried out over the network (AV:N). There is no evidence of active exploitation, and no public exploit code is available on platforms like Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, indicating a low level of public attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.30.1CPE matchmatch criteria
cpe:2.3:a:auth0:lock:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.54%
Probability of exploitation in next 30 days
EPSS Percentile
72.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0154 is in the 85th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: auth0-lockFixed in: 11.30.1

Vendor Advisories (1)

npmGHSA-jr3j-whm4-9wwmhigh

Reflected XSS when using flashMessages or languageDictionary

Jun 4, 2021

References

github.com / auth0/lock/commit/d139cf01c8234b07caf265e051f39d3eab08f7ed
PatchThird Party Advisory
github.com / auth0/lock/releases/tag/v11.30.1
Release NotesThird Party Advisory
github.com / auth0/lock/security/advisories/GHSA-jr3j-whm4-9wwm
ExploitThird Party Advisory