CVE-2020-5263: Information disclosure through error object

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-09 · updated 2026-06-17
Weakness: CWE-522

Description

auth0.js (NPM package auth0-js) greater than version 8.0.0 and before version 9.12.3 has a vulnerability. In the case of an (authentication) error, the error object returned by the library contains the original request of the user, which may include the plaintext password the user entered. If the error object is exposed or logged without modification, the application risks password exposure. This is fixed in version 9.12.3

Affected products

auth0.js: from 8.0.0 through 9.13.1

References

https://github.com/auth0/auth0.js/commit/355ca749b229fb93142f0b3978399b248d710828
https://github.com/auth0/auth0.js/security/advisories/GHSA-prfq-f66g-43mp
https://github.com/auth0/auth0.js/commit/355ca749b229fb93142f0b3978399b248d710828
https://github.com/auth0/auth0.js/security/advisories/GHSA-prfq-f66g-43mp

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