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GHSA-2vc4-3hx7-v7v7
No affected components available
Summary
The application does not sufficiently sanitize user input, allowing for the execution of arbitrary JavaScript code. The 'saveNode' and 'saveManifest' endpoints take user input and store it in the JSON schema for the site. This content is then rendered in the generated HAX site.
Although the application does not allow users to supply a 'script' tag, it does allow the use of other HTML tags to run JavaScript.
Affected Resources
- Operations.php:258
saveManifest() - Operations.php:868
saveNode() https://<site>/<user>/system/api/saveNodehttps://<site>/<user>/system/api/saveManifest
Impact
An authenticated attacker can use the site editor and settings editor to store malicious payloads in a HAX site which execute arbitrary JavaScript when a user visits the site. This can be used to steal a user's session cookie or other sensitive data.
PoCs
saveNode
To replicate this vulnerability, an attacker can use the "View Source" functionality within the site editor to enter a malicious payload.
- Select "View Source" within the HAX site editor and enter an XSS payload that does not use the "script" HTML tag.
- Select "Update HTML" and observe the resulting alert.
saveManifest
To exploit the 'SaveManifest' endpoint, an attacker can insert executable code into the URL field of the site settings editor: any payload added this way will execute when the site is loaded.
- Open the site settings editor.
- Add JavaScript code to the URL field under the "Theme" header.
- Reload the page to run the script.
- The resulting page source will contain the script.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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