Cross-site scripting in REDAXO - #VU140670
Published: August 1, 2026
Vulnerability identifier: #VU140670
CSH Severity: Medium
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary JavaScript in the victim's browser within the backend origin.
The vulnerability exists due to cross-site scripting in the backend media pool detail page when handling the opener_link request parameter. A remote attacker can send a specially crafted link to inject arbitrary HTML and JavaScript and execute arbitrary JavaScript in the victim's browser within the backend origin.
User interaction is required, and exploitation succeeds only when a logged-in backend user with media permissions opens a crafted link, opener_input_field is absent from the request, and file_id references an existing media file.
Affected software
REDAXO
Remediation
Install security update from vendor's website.
REDAXO - update to 5.21.3