How severe is CVE-2020-5263?

CVE-2020-5263 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-5263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5263?

CVE-2020-5263 affects Auth0 Auth0.js. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5263?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-5263 published?

CVE-2020-5263 was published on 2020-04-09 and last updated on 2026-06-17.

CVE-2020-5263

CVE-2020-5263 is a medium-severity vulnerability in Auth0 Auth0.js with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Auth0 Auth0.js
Published: 2020-04-09
Last modified: 2026-06-17

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

Frequently asked questions

What is CVE-2020-5263?: 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
How severe is CVE-2020-5263?: CVE-2020-5263 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-5263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5263?: CVE-2020-5263 affects Auth0 Auth0.js. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-5263 published?: CVE-2020-5263 was published on 2020-04-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:auth0:auth0.js:*:*:*:*:*:*:*:*

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