CVE-2015-9235: auth0 jsonwebtoken Improper Input Validation
Vulnerability summary
CVE-2015-9235 is a critical (CVSS 9.8) Improper Input Validation vulnerability in auth0 jsonwebtoken. EPSS estimates a 8.52% chance of exploitation in the next 30 days, higher than 95% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 29-05-2018PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
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).
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
8.52%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
-0.13 pp
From 8.65% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (timmclean.net)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-327Use of a Broken or Risky Cryptographic AlgorithmThe product uses a broken or risky cryptographic algorithm or protocol.
Affected systems
Auth01 product
- jsonwebtoken< 4.2.2
Chainguard1 product
- jitsucom-jitsuAll versions (No fix recorded)
Hackerone1 product
- jsonwebtoken node module< 4.2.2
Npm1 product
- jsonwebtoken< 4.2.2
Wolfi1 product
- jitsucom-jitsuAll versions (No fix recorded)
5 vendors · 5 products
References
8 links- github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b687X Refsource MISCPatchThird Party AdvisoryWEB
- auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/X Refsource MISCBroken LinkVendor Advisory
