CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
What the vulnerability does
The WP Hello Bar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'digit_one' and 'digit_two' parameters in all versions up to, and including, 1.02 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
WP Hello Bar versions 1.02 and earlier contain a cross-site scripting vulnerability in the plugin's output handling. An attacker with high-level site privileges can inject malicious scripts that execute in other users' browsers when they view affected pages. The vulnerability requires specific conditions to exploit and has limited impact on confidentiality and integrity.
What an attacker can do
Inject JavaScript code that runs in other users' browsers to steal data or perform actions on their behalf.
Potential impact on your site
A malicious admin or compromised high-privilege account can inject scripts affecting other users; update the plugin immediately.
Conditions required to exploit
Attacker must have high-level WordPress privileges (administrator or equivalent); no user interaction required.
Key dates
External resources
