CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
What the vulnerability does
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Leap13 Premium Blocks – Gutenberg Blocks for WordPress premium-blocks-for-gutenberg.This issue affects Premium Blocks – Gutenberg Blocks for WordPress: from n/a through <= 2.1.27.
Explanation of Vulnerability in Simple Terms
Premium Blocks contains a stored cross-site scripting (XSS) vulnerability in versions up to 2.1.27. An authenticated user with low privileges can inject malicious scripts into block content. When other users view the affected page, the script executes in their browser, potentially allowing the attacker to steal session tokens, modify page content, or perform actions on their behalf. The vulnerability requires user interaction to trigger.
What an attacker can do
Inject malicious scripts that execute when other users view the affected page, stealing their session data or performing actions as them.
Potential impact on your site
Authenticated users can inject persistent malicious code affecting all site visitors; requires immediate plugin update to prevent account compromise.
Conditions required to exploit
Attacker must be logged in with low-level user privileges and trick a user into viewing a page containing the malicious block.
Key dates
External resources
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