Contao up to 4.4.55/4.9.17/4.11.6 HTML Field HTML injection

Summaryinfo

A vulnerability, which was classified as problematic, was found in Contao up to 4.4.55/4.9.17/4.11.6. Impacted is an unknown function of the component HTML Field Handler. Such manipulation leads to HTML injection. This vulnerability is uniquely identified as CVE-2021-35955. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Contao up to 4.4.55/4.9.17/4.11.6. Affected by this issue is some unknown functionality of the component HTML Field Handler. The manipulation with an unknown input leads to a html injection vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity.

The weakness was disclosed 08/13/2021. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-35955. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 4.4.56, 4.9.18 or 4.11.7 eliminates this vulnerability. The upgrade is hosted for download at contao.org.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• Contao

Version

• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.4.6
• 4.4.7
• 4.4.8
• 4.4.9
• 4.4.10
• 4.4.11
• 4.4.12
• 4.4.13
• 4.4.14
• 4.4.15
• 4.4.16
• 4.4.17
• 4.4.18
• 4.4.19
• 4.4.20
• 4.4.21
• 4.4.22
• 4.4.23
• 4.4.24
• 4.4.25
• 4.4.26
• 4.4.27
• 4.4.28
• 4.4.29
• 4.4.30
• 4.4.31
• 4.4.32
• 4.4.33
• 4.4.34
• 4.4.35
• 4.4.36
• 4.4.37
• 4.4.38
• 4.4.39
• 4.4.40
• 4.4.41
• 4.4.42
• 4.4.43
• 4.4.44
• 4.4.45
• 4.4.46
• 4.4.47
• 4.4.48
• 4.4.49
• 4.4.50
• 4.4.51
• 4.4.52
• 4.4.53
• 4.4.54
• 4.4.55
• 4.9.0
• 4.9.1
• 4.9.2
• 4.9.3
• 4.9.4
• 4.9.5
• 4.9.6
• 4.9.7
• 4.9.8
• 4.9.9
• 4.9.10
• 4.9.11
• 4.9.12
• 4.9.13
• 4.9.14
• 4.9.15
• 4.9.16
• 4.9.17
• 4.11.0
• 4.11.1
• 4.11.2
• 4.11.3
• 4.11.4
• 4.11.5
• 4.11.6

Website

• Product: https://github.com/contao/contao/

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