CVE-2015-9235
9.8
CRITICAL · CVSS 3.0 · EPSS 8.5% (pctl 95)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
In jsonwebtoken node module before 4.2.2 it is possible for an attacker to bypass verification when a token digitally signed with an asymmetric key (RS/ES family) of algorithms but instead the attacker send a token digitally signed with a symmetric algorithm (HS* family).
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 8.52% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-20 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-05-29 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| auth0 | jsonwebtoken |
References
- https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/
- https://github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b687
- https://nodesecurity.io/advisories/17
- https://www.timmclean.net/2015/02/25/jwt-alg-none.html
- https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/
- https://github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b687
- https://nodesecurity.io/advisories/17
- https://www.timmclean.net/2015/02/25/jwt-alg-none.html
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