CVE-2025-68859 HIGH

CVE-2025-68859: WordPress Syntax Highlighter Compress plugin <= 3.0.83.3 - Reflected Cross Site Scripting (XSS) vulnerability

Vendor Agmorpheus
Product Syntax Highlighter Compress
Weakness CWE-79 · XSS
Published January 22, 2026
Last update April 28, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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

Related vulnerabilities

08Related CVE