A vulnerability was found in Redaxo 5.6.3. It has been classified as problematic. This affects some unknown functionality of the file addons/mediapool/pages/index.php. The manipulation of the argument opener_input_field as part of a Variable leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

The $opener_input_field variable in addons/mediapool/pages/index.php in REDAXO 5.6.3 is not effectively filtered and is output directly to the page. The attacker can insert XSS payloads via an index.php?page=mediapool/media&opener_input_field=[XSS] request.

The bug was discovered 09/29/2018. The weakness was shared 10/09/2018 (Website). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2018-18198 since 10/09/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 10 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:addons/mediapool/pages/index.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• Redaxo

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• 5.6.3

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CPE 2.2info

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