XSS in SAML SP Single Sign On plugin for WordPress

1) Cross-site scripting

EUVDB-ID: #VU25406

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6850

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 a specially crafted SAML XML Response. 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 updates from vendor's website.

Vulnerable software versions

SAML SP Single Sign On – SSO: 4.8.23 - 4.8.83

External links

http://wpvulndb.com/vulnerabilities/10072/
http://zeroauth.ltd/blog/2020/01/28/cve-2020-6850-miniorange-saml-wp-plugin-before-4-8-84-is-vulnerable-to-xss-via-a-specially-crafted-saml-xml-response/

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.