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CVE-2020-15084

29
FAUCET Score

CVE-2020-15084 is a critical authorization bypass vulnerability affecting the express-jwt NPM package, specifically versions up to and including 5.3.3, when used in conjunction with libraries like jwks-rsa without explicitly configuring the "algorithms" parameter. This vulnerability carries a CVSS score of 9.1 (Critical), indicating a severe risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality and integrity compromise. While the vulnerability is critical, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding it.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.3.3CPE matchmatch criteria
cpe:2.3:a:auth0:express-jwt:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.3
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 46th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: express-jwtFixed in: 6.0.0

Vendor Advisories (1)

npmGHSA-6g6m-m6h5-w9gfhigh

Authorization bypass in express-jwt

Jun 30, 2020

References

github.com / auth0/express-jwt/commit/7ecab5f8f0cab5297c2b863596566eb0c019cdef
PatchThird Party Advisory
github.com / auth0/express-jwt/security/advisories/GHSA-6g6m-m6h5-w9gf
Third Party Advisory