What the vulnerability does
01Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in agmorpheus Syntax Highlighter Compress syntax-highlighter-compress allows Reflected XSS.This issue affects Syntax Highlighter Compress: from n/a through <= 3.0.83.3.
Explanation of Vulnerability in Simple Terms
02Summary
Syntax Highlighter Compress versions 3.0.83.3 and earlier contain a cross-site scripting (XSS) vulnerability. An attacker can inject malicious scripts that execute in users' browsers when they view affected pages. The vulnerability requires user interaction and can affect other users on the site. Update to a version newer than 3.0.83.3 to remediate.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in users' browsers and steal session data or perform actions on their behalf.
Potential impact on your site
04Site Impact
Users visiting affected pages may have their sessions compromised or be redirected to malicious sites.
Conditions required to exploit
05Prerequisites
No authentication required. Victim must visit a page containing the injected payload.
Key dates
06Disclosure timeline
January 22, 2026
CVE published
April 28, 2026
Record updated