CVE-2018-6873
CVE-2018-6873 is a critical-severity vulnerability in Auth0 Auth0.js with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: Auth0 Auth0.js
- Published:
- Last modified:
Description
The Auth0 authentication service before 2017-10-15 allows privilege escalation because the JWT audience is not validated.
Frequently asked questions
- What is CVE-2018-6873?
- The Auth0 authentication service before 2017-10-15 allows privilege escalation because the JWT audience is not validated.
- How severe is CVE-2018-6873?
- CVE-2018-6873 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-6873 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-6873?
- CVE-2018-6873 affects Auth0 Auth0.js. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-6873?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2018-6873 published?
- CVE-2018-6873 was published on 2018-04-04 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:auth0:auth0.js:*:*:*:*:*:*:*:*
More vulnerabilities in Auth0 Auth0.js
- CVE-2018-6874 — High (CVSS 8.8): CSRF exists in the Auth0 authentication service through 14591 if the Legacy Lock API flag is enabled.
- CVE-2018-7307 — High (CVSS 8.8): The Auth0 Auth0.js library before 9.3 has CSRF because it mishandles the case where the authorization response lacks…
- CVE-2020-15125 — High (CVSS 7.7): In auth0 (npm package) versions before 2.27.1, a DenyList of specific keys that should be sanitized from the request…
- CVE-2017-17068 — High (CVSS 7.5): A cross-origin vulnerability has been discovered in the Auth0 auth0.js library affecting versions < 8.12. This…
- CVE-2026-42280 — High (CVSS 7.1): Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the…
- CVE-2020-5263 — Medium (CVSS 5.5): auth0.js (NPM package auth0-js) greater than version 8.0.0 and before version 9.12.3 has a vulnerability. In the case…
All CVEs affecting Auth0 Auth0.js →
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Browse all CWE-287 (Improper Authentication) vulnerabilities →