Cross-Site Scripting Vulnerability in Contao Web Application
CVE-2021-35955

4.8MEDIUM

Key Information:

Vendor

Contao

Status
Contao
Vendor
CVE Published:
12 August 2021

What is CVE-2021-35955?

The vulnerability in Contao versions 4.0.0 and above allows attackers to exploit backend Cross-Site Scripting (XSS) via HTML attributes in an HTML field. This can potentially lead to unauthorized access and manipulation within the application's backend interface. Users are advised to upgrade to versions 4.4.56, 4.9.18, or 4.11.7 to mitigate this risk.

References

https://contao.org/en/news/contao-4-9-16-and-4-11-5-are-a...
x_refsource_MISC
https://github.com/contao/contao/security/advisories/GHSA...
x_refsource_MISC

CVSS V3.1

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.