Cross-site scripting in REDAXO - #VU135824
Published: June 29, 2026
Vulnerability identifier: #VU135824
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: REDAXO
Affected software:
REDAXO
REDAXO
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary JavaScript in the browser of a backend user.
The vulnerability exists due to cross-site scripting in the mediapool sync page (sync.php) when rendering filesystem filenames from the /media directory into HTML. A remote privileged user can place a file with a specially crafted filename in the media directory to execute arbitrary JavaScript in the browser of a backend user.
User interaction is required to view the Mediapool → Sync page, and the page is accessible to backend users with the media[sync] permission.
Remediation
Install security update from vendor's website.