How severe is CVE-2019-20173?

CVE-2019-20173 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-20173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20173?

CVE-2019-20173 affects Auth0 Login By Auth0. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20173?

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

When was CVE-2019-20173 published?

CVE-2019-20173 was published on 2020-02-05 and last updated on 2026-06-17.

CVE-2019-20173

CVE-2019-20173 is a medium-severity vulnerability in Auth0 Login By Auth0 with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Auth0 Login By Auth0
Published: 2020-02-05
Last modified: 2026-06-17

Description

The Auth0 wp-auth0 plugin 3.11.x before 3.11.3 for WordPress allows XSS via a wle parameter associated with wp-login.php.

Frequently asked questions

What is CVE-2019-20173?: The Auth0 wp-auth0 plugin 3.11.x before 3.11.3 for WordPress allows XSS via a wle parameter associated with wp-login.php.
How severe is CVE-2019-20173?: CVE-2019-20173 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-20173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20173?: CVE-2019-20173 affects Auth0 Login By Auth0. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-20173 published?: CVE-2019-20173 was published on 2020-02-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:auth0:login_by_auth0:*:*:*:*:*:wordpress:*:*

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