{"items":[{"id":"NVI-00007519","kind":"vulnerability","title":"LibreNMS has a Stored XSS in Custom OID - unit parameter missing strip_tags()","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-fqx6-693c-f55g","CVE-2026-27016"],"plain_summary":"OSV carries this publisher advisory for librenms/librenms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 26.2.0 for librenms/librenms. Confirm the publisher’s latest guidance.","source_ids":["sr-dea9c79c3231dcea2ae010beea4b9f58"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-25a8a18726e9cdd98f519357848d9233"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.263%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.18085. Missing scores are unknown.","source_id":"sr-25a8a18726e9cdd98f519357848d9233"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-dea9c79c3231dcea2ae010beea4b9f58","url":"https://github.com/advisories/GHSA-fqx6-693c-f55g","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-fqx6-693c-f55g","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.407Z"},{"id":"sr-25a8a18726e9cdd98f519357848d9233","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-27016","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.849Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-dea9c79c3231dcea2ae010beea4b9f58"],"technology":"librenms/librenms","known_exclusions":[],"conditions_summary":"### Summary\nThe `unit` parameter in Custom OID functionality lacks `strip_tags()` sanitization while other fields (`name`, `oid`, `datatype`) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping, allowing Stored XSS.\n\n### Details\n**Vulnerable Input Processing (`includes/html/forms/customoid.inc.php` lines 18-21):**\n```php\n$name = strip_tags((string) $_POST['name']);       // line 18 - SANITIZED\n$oid = strip_tags((string) $_POST['oid']);         // line 19 - SANITIZED\n$datatype = strip_tags((string) $_POST['datatype']);  // line 20 - SANITIZED\n$unit = $_POST['unit'];                            // line 21 - NOT SANITIZED!\n```\n\n**Vulnerable Output (`graphs/customoid.inc.php` lines 13-20):**\n```php\n$customoid_unit = $customoid['customoid_unit'];  // Retrieved from DB\n$customoid_current = \\LibreNMS\\Util\\Number::formatSi(...) . $customoid_unit;\necho \"...$customoid_current...\";  // ECHOED WITHOUT ESCAPING!\n```\n\n### PoC\n\n```python\n#!/usr/bin/env python3\n\"\"\"\nXSS test for LibreNMS Custom OID - unit parameter\n\"\"\"\n\nimport html as html_module\nimport re\n\ndef strip_tags(value):\n    return re.sub(r']*?>', '', str(value))\n\n# Simulate form processing ","public_affected_ranges":["ECOSYSTEM: introduced 24.10.0; fixed 26.2.0"]}],"null_published_at":"2026-11-08T19:53:33.658Z","source_updated_at":"2026-02-20T17:02:57.110Z","source_disclosed_at":"2026-02-18T22:08:15.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:20.407Z"},{"id":"NVI-00007519","kind":"vulnerability","title":"LibreNMS has a Stored XSS in Custom OID - unit parameter missing strip_tags()","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-fqx6-693c-f55g","CVE-2026-27016"],"plain_summary":"OSV carries this publisher advisory for librenms/librenms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 26.2.0 for librenms/librenms. Confirm the publisher’s latest guidance.","source_ids":["sr-dea9c79c3231dcea2ae010beea4b9f58"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-75adab8c72d1f7a1ac6b137f4a803a46"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.263%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.18111. Missing scores are unknown.","source_id":"sr-75adab8c72d1f7a1ac6b137f4a803a46"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-dea9c79c3231dcea2ae010beea4b9f58","url":"https://github.com/advisories/GHSA-fqx6-693c-f55g","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-fqx6-693c-f55g","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.407Z"},{"id":"sr-75adab8c72d1f7a1ac6b137f4a803a46","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-27016","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.376Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-dea9c79c3231dcea2ae010beea4b9f58"],"technology":"librenms/librenms","known_exclusions":[],"conditions_summary":"### Summary\nThe `unit` parameter in Custom OID functionality lacks `strip_tags()` sanitization while other fields (`name`, `oid`, `datatype`) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping, allowing Stored XSS.\n\n### Details\n**Vulnerable Input Processing (`includes/html/forms/customoid.inc.php` lines 18-21):**\n```php\n$name = strip_tags((string) $_POST['name']);       // line 18 - SANITIZED\n$oid = strip_tags((string) $_POST['oid']);         // line 19 - SANITIZED\n$datatype = strip_tags((string) $_POST['datatype']);  // line 20 - SANITIZED\n$unit = $_POST['unit'];                            // line 21 - NOT SANITIZED!\n```\n\n**Vulnerable Output (`graphs/customoid.inc.php` lines 13-20):**\n```php\n$customoid_unit = $customoid['customoid_unit'];  // Retrieved from DB\n$customoid_current = \\LibreNMS\\Util\\Number::formatSi(...) . $customoid_unit;\necho \"...$customoid_current...\";  // ECHOED WITHOUT ESCAPING!\n```\n\n### PoC\n\n```python\n#!/usr/bin/env python3\n\"\"\"\nXSS test for LibreNMS Custom OID - unit parameter\n\"\"\"\n\nimport html as html_module\nimport re\n\ndef strip_tags(value):\n    return re.sub(r']*?>', '', str(value))\n\n# Simulate form processing ","public_affected_ranges":["ECOSYSTEM: introduced 24.10.0; fixed 26.2.0"]}],"null_published_at":"2026-11-01T19:14:01.601Z","source_updated_at":"2026-02-20T17:02:57.110Z","source_disclosed_at":"2026-02-18T22:08:15.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:20.407Z"},{"id":"NVI-00007519","kind":"vulnerability","title":"LibreNMS has a Stored XSS in Custom OID - unit parameter missing strip_tags()","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-fqx6-693c-f55g","CVE-2026-27016"],"plain_summary":"OSV carries this publisher advisory for librenms/librenms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 26.2.0 for librenms/librenms. Confirm the publisher’s latest guidance.","source_ids":["sr-dea9c79c3231dcea2ae010beea4b9f58"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-dea9c79c3231dcea2ae010beea4b9f58","url":"https://github.com/advisories/GHSA-fqx6-693c-f55g","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-fqx6-693c-f55g","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.407Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-dea9c79c3231dcea2ae010beea4b9f58"],"technology":"librenms/librenms","known_exclusions":[],"conditions_summary":"### Summary\nThe `unit` parameter in Custom OID functionality lacks `strip_tags()` sanitization while other fields (`name`, `oid`, `datatype`) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping, allowing Stored XSS.\n\n### Details\n**Vulnerable Input Processing (`includes/html/forms/customoid.inc.php` lines 18-21):**\n```php\n$name = strip_tags((string) $_POST['name']);       // line 18 - SANITIZED\n$oid = strip_tags((string) $_POST['oid']);         // line 19 - SANITIZED\n$datatype = strip_tags((string) $_POST['datatype']);  // line 20 - SANITIZED\n$unit = $_POST['unit'];                            // line 21 - NOT SANITIZED!\n```\n\n**Vulnerable Output (`graphs/customoid.inc.php` lines 13-20):**\n```php\n$customoid_unit = $customoid['customoid_unit'];  // Retrieved from DB\n$customoid_current = \\LibreNMS\\Util\\Number::formatSi(...) . $customoid_unit;\necho \"...$customoid_current...\";  // ECHOED WITHOUT ESCAPING!\n```\n\n### PoC\n\n```python\n#!/usr/bin/env python3\n\"\"\"\nXSS test for LibreNMS Custom OID - unit parameter\n\"\"\"\n\nimport html as html_module\nimport re\n\ndef strip_tags(value):\n    return re.sub(r']*?>', '', str(value))\n\n# Simulate form processing ","public_affected_ranges":["ECOSYSTEM: introduced 24.10.0; fixed 26.2.0"]}],"null_published_at":"2026-10-31T22:13:18.623Z","source_updated_at":"2026-02-20T17:02:57.110Z","source_disclosed_at":"2026-02-18T22:08:15.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:42:20.407Z"}],"next_cursor":null,"snapshot_revision":"42594"}