Improper Neutralization of Special Elements Used in a Template Engine in Contao - #VU165875
Published: November 11, 2026
Vulnerability identifier: #VU165875
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-1336
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose information such as the Contao version.
The vulnerability exists due to improper neutralization of insert tags in the Contao breadcrumb module when rendering 404 pages. A remote attacker can inject insert tags into these pages to retrieve application information.
Affected software
Contao
Remediation
Install security update from vendor's website.
Contao - addressed in versions 5.3.54, 5.7.17, 6.0.6