CVE-2023-6813Network attack vector

Reflected XSS via propagated wle parameter

Published Jul 10, 2024 · Updated Apr 8, 2026

Reflected XSS in the login fallback of Auth0's Login by Auth0 4.6.0 and earlier allows remote attackers to execute scripts via wle. The wp_auth0_filter_login_override_url function copies the request's wle value into generated login and lost-password URLs without URL-context escaping. A site administrator must enable wle fallback handling, and a victim must follow a crafted link; injected script runs in the site's origin and can read or alter page data.

CVSS severity6.1
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in the login fallback of Auth0's Login by Auth0 4.6.0 and earlier allows remote attackers to execute scripts via wle. The wp_auth0_filter_login_override_url function copies the request's wle value into generated login and lost-password URLs without URL-context escaping. A site administrator must enable wle fallback handling, and a victim must follow a crafted link; injected script runs in the site's origin and can read or alter page data.

The record

CVE
CVE-2023-6813
Published
Jul 10, 2024
Updated
Apr 8, 2026
Vendor
Auth0
Product
Login by Auth0
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Auth0 · Login by Auth0version=0 <=4.6.0

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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