CVE-2017-17068 — A cross-origin vulnerability has been discovered in the Auth0 auth0

A cross-origin vulnerability has been discovered in the Auth0 auth0.js library affecting versions < 8.12. This vulnerability allows an attacker to acquire authenticated users' tokens and invoke services on a user's behalf if the target site or application uses a popu

01What is this vulnerability?

A cross-origin vulnerability has been discovered in the Auth0 auth0.js library affecting versions < 8.12. This vulnerability allows an attacker to acquire authenticated users' tokens and invoke services on a user's behalf if the target site or application uses a popup callback page with auth0.popup.callback().

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-12-06T19:29:00.233
• Last modified: 2026-05-13T00:24:29.033

09References

• appcheck-ng.com — https://appcheck-ng.com/appcheck-discovers-vulnerability-auth0-library-cve-2017-…
• auth0.com — https://auth0.com/docs/security/bulletins/cve-2017-17068
• appcheck-ng.com — https://appcheck-ng.com/appcheck-discovers-vulnerability-auth0-library-cve-2017-…
• auth0.com — https://auth0.com/docs/security/bulletins/cve-2017-17068