{"id":"CVE-2025-23200","aliases":["GHSA-c66p-64fj-jmc2"],"url":"https://o3.security/vulnerability/CVE-2025-23200","summary":"Stored XSS-LibreNMS-Misc Section in librenms","details":"# StoredXSS-LibreNMS-MiscSection\n\n\n**Description:**\n\n\nStored XSS on the parameter: `ajax_form.php` -> param: state\n\nRequest:\n```http\nPOST /ajax_form.php HTTP/1.1\nHost: <your_host>\nX-Requested-With: XMLHttpRequest\nX-CSRF-TOKEN: <your_XSRF_token>\nContent-Type: application/x-www-form-urlencoded; charset=UTF-8\nCookie: <your_cookie>\n\ntype=override-config&device_id=1&attrib=override_icmp_disable&state=\"><img%20src%20onerror=\"alert(1)\"> \n```\n\n\nof Librenms version 24.10.1 ([https://github.com/librenms/librenms](https://github.com/librenms/librenms)) allows remote attackers to inject malicious scripts. When a user views or interacts with the page displaying the data, the malicious script executes immediately, leading to potential unauthorized actions or data exposure.\n\n\nThe vulnerability in the line:\n```php\n$attrib_val = get_dev_attrib($device, $name);\n```\nwithin the `dynamic_override_config` function arises because the value of `$attrib_val is` retrieved from untrusted data without any sanitization or encoding (at [Line 778](https://github.com/librenms/librenms/blob/master/includes/html/functions.inc.php#L778)). \n\nWhen `dynamic_override_config` is called, the unescaped `$attrib_val` is injected directly into the HTML (at [misc.inc.php](https://github.com/librenms/librenms/blob/master/includes/html/pages/device/edit/misc.inc.php)).\n\n\n**Proof of Concept:**\n1. Add a new device through the LibreNMS interface.\n2. Edit the newly created device and select the Misc section.\n3. In any of the following fields: \"Override default ssh port\", \"Override default telnet port\", \"Override default http port\" or \"Unix agent port\", enter the payload: `\"><img src onerror=\"alert(document.cookie)\">`.\n4. Save the changes.\n5. Observe that when the page loads, the XSS payload executes, triggering a popup that displays the current cookies.\n\n\n\n![image](https://github.com/user-attachments/assets/097d17cb-7a6c-4924-add8-f867df643025)\n![image](https://github.com/user-attachments/assets/8213d55a-d87a-4a6e-94bf-092877398da5)\n\n\n**Impact:**\n\nExecution of Malicious Code","published":"2025-01-16T22:20:51.907Z","modified":"2026-08-12T03:51:15.559550743Z","cvss":{"score":4.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"librenms/librenms","fixedVersion":"24.11.0"}],"fix":{"url":"https://github.com/librenms/librenms/pull/16722","label":"librenms/librenms#16722"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23200.json"},{"type":"ADVISORY","url":"https://github.com/librenms/librenms/security/advisories/GHSA-c66p-64fj-jmc2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-23200"},{"type":"WEB","url":"https://github.com/librenms/librenms/pull/16722"},{"type":"WEB","url":"https://github.com/librenms/librenms/commit/26258a2518dbfa55b213ec4b90ec16ed97efb597"},{"type":"PACKAGE","url":"https://github.com/librenms/librenms"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:15.559550743Z"}}