CVE-2025-48947Network attack vector

Session cookie disclosure via missing cache headers

Published Jun 4, 2025 · Updated Jun 4, 2025

Improper caching in Auth0 Next.js SDK 4.0.1 through 4.6.0 allows remote attackers to receive another user's session cookie from a CDN. Session-setting, deletion, refresh, and user-session responses omit directives that prevent shared caching of Set-Cookie data. Exposure requires a caching CDN, absent application cache controls, and a victim request; a disclosed cookie enables session impersonation.

CVSS severity7.7
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper caching in Auth0 Next.js SDK 4.0.1 through 4.6.0 allows remote attackers to receive another user's session cookie from a CDN. Session-setting, deletion, refresh, and user-session responses omit directives that prevent shared caching of Set-Cookie data. Exposure requires a caching CDN, absent application cache controls, and a victim request; a disclosed cookie enables session impersonation.

The record

CVE
CVE-2025-48947
Published
Jun 4, 2025
Updated
Jun 4, 2025
Vendor
Auth0
Product
Auth0 Next.js SDK
Classifications
CWE-525, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.0.1, < 4.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Auth0 · Auth0 Next.js SDKversion=>= 4.0.1, < 4.6.1

Published CVSS scores

7.7GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-525Use of Web Browser Cache Containing Sensitive Information
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo