Stored cross-site scripting in EU Cookie Law plugin for WordPress

1) Stored cross-site scripting

EUVDB-ID: #VU21921

Risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-16522

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 improper encoding of several configuration options in the admin area "/wp-admin/options-general.php?page=peadig_eucookie" and the displayed cookie consent message (Font Color, Background Color and "Disable Cookie" text). A remote authenticated administrator can permanently inject 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

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

EU Cookie Law: 1.0 - 3.0.6

External links

http://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-01_WordPress_Plugin_EU_Cookie_Law
http://wordpress.org/plugins/eu-cookie-law/#developers

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.