THREATPORT/VULNERABILITY/CVE-2015-9235
CRITICAL SEVERITY

CVE-2015-9235

Jsonwebtoken vulnerability

CVSS
9.8
EPSS
8.7%
EPSS pct
95th
Exploited
No known
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).
Affected vendor
Auth0
Affected product
Jsonwebtoken
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
  • CWE-327 — Use of a Broken or Risky Cryptographic Algorithm
Published
2018-05-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 8.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2015-9235

  • Confirm whether Auth0 Jsonwebtoken is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2015-9235.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-9235

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-9235 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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