Cross-site scripting in Login by Auth0 plugin for WordPress

1) Cross-site scripting

EUVDB-ID: #VU25001

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-20173

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data passed via the "wle" parameter associated with "wp-login.php". A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Login by Auth0: 3.11.0 - 3.11.2

CPE2.3

• cpe:2.3:a:auth0:auth0:3.11.0:*:*:*:*:wordpress:*:*
• cpe:2.3:a:auth0:auth0:3.11.1:*:*:*:*:wordpress:*:*
• cpe:2.3:a:auth0:auth0:3.11.2:*:*:*:*:wordpress:*:*

External links

https://auth0.com/docs/security/bulletins/cve-2019-20173
https://github.com/auth0/wp-auth0/releases/tag/3.11.3
https://wpvulndb.com/vulnerabilities/10059

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.