VULNERABILITY INTELLIGENCE
CVE-2026-73679
CVSS score7.2 HIGH
EPSS probability1.13%
CISA KEVNot currently listed
Published2026-08-14
Last modified2026-08-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Description
ImpressCMS contains an authenticated remote code execution vulnerability in the custom tag module that allows authenticated administrators to execute arbitrary PHP code by storing a malicious payload in a custom tag with PHP type enabled. The application decodes HTML-encoded content via undoHtmlSpecialChars() before passing it to eval() in the renderWithPhp() method, bypassing HTML Purifier sanitization, and the payload is triggered on every frontend page load through the preload event system.
Weakness classification
- disclosure@vulncheck.com: CWE-94