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CVE-2021-32702

20
FAUCET Score

CVE-2021-32702 is a reflected Cross-Site Scripting (XSS) vulnerability affecting Auth0 Next.js SDK versions 1.4.1 and below. An attacker can inject arbitrary code via the 'error' query parameter, which is then processed and reflected in the callback handler. This vulnerability carries a CVSS score of 6.1 (Medium) due to its network attack vector, low attack complexity, and potential for limited impact on confidentiality and integrity. While no active exploitation, public exploit code, or significant community discussion has been observed, affected users should upgrade to version 1.4.1 to mitigate the risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.2CPE matchmatch criteria
cpe:2.3:a:auth0:nextjs-auth0:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

8.0HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.40%
Probability of exploitation in next 30 days
EPSS Percentile
69.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0140 is in the 82nd 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/nextjs-auth0Fixed in: 1.4.2

Vendor Advisories (1)

npmGHSA-954c-jjx6-cxv7high

Reflected XSS from the callback handler's error query parameter

Jun 28, 2021

References

github.com / auth0/nextjs-auth0/commit/6996e2528ceed98627caa28abafbc09e90163ccf
PatchThird Party Advisory
github.com / auth0/nextjs-auth0/security/advisories/GHSA-954c-jjx6-cxv7
Third Party Advisory
npmjs.com / package/%40auth0/nextjs-auth0