{"items":[{"id":"NVI-00006373","kind":"vulnerability","title":"Grav Form Plugin has an Anonymous Page Content Overwrite via Form File Upload filename Override","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w4rc-p66m-x6qq","CVE-2026-42845"],"plain_summary":"GitHub lists this reviewed advisory for getgrav/grav-plugin-form. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-1ec6f8828f8b6a320f5d7960d0bf07af"],"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},{"summary":"The original advisory lists fixed boundaries 9.1.0 for getgrav/grav-plugin-form. Confirm the publisher’s latest guidance.","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"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":[{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.741%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.5468. Missing scores are unknown.","source_id":"sr-1ec6f8828f8b6a320f5d7960d0bf07af"}],"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-3266beba51dcbb2617b3771f3483b382","url":"https://github.com/advisories/GHSA-w4rc-p66m-x6qq","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w4rc-p66m-x6qq","publisher":"GitHub Advisory Database","observed_at":"2026-11-08T15:08:00.152Z"},{"id":"sr-b227ec67657b72d4c46a3ddaca4e4253","url":"https://github.com/advisories/GHSA-w4rc-p66m-x6qq","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-w4rc-p66m-x6qq","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.382Z"},{"id":"sr-1ec6f8828f8b6a320f5d7960d0bf07af","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-2026-42845","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.784Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3266beba51dcbb2617b3771f3483b382"],"technology":"getgrav/grav-plugin-form","known_exclusions":[],"conditions_summary":"### Summary\n(Tested on Form 9.0.3 released on April, 28th)\n\nThe Form plugin's file upload handler at `user/plugins/form/classes/Form.php:583` accepts a POST-supplied `filename` parameter (`$filename = $post['filename'] ?? $upload['file']['name']`) that overrides the original uploaded filename. The override passes through `Utils::checkFilename()`, which blocks only a narrow extension list (`.php*`, `.htm*`, `.js`, `.exe`). Markdown (`.md`) is **not** blocked.\n\nA page's directory under `user/pages/` contains its `.md` content file (e.g. `default.md`, `form.md`). When a form's file upload field has `accept: ['*']` (or any policy that admits text files), an unauthenticated visitor can:\n\n1. Upload **arbitrary content** with **`filename=form.md`** (or other page-content filenames),\n2. Submit the form to trigger `Form::copyFiles()`, which **overwrites the page's own `.md` file**.\n\n### Details\n**Vulnerable code path**\n\n`user/plugins/form/classes/Form.php:580-606` (in `uploadFiles()`):\n```php\n$grav->fireEvent('onFormUploadSettings', new Event(['settings' => &$settings, 'post' => $post]));\n\n$upload = json_decode(json_encode($this->normalizeFiles($_FILES['data'], $settings->name)), true);\n$fi","public_affected_ranges":["< 9.1.0"]},{"certainty":"source_listed","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"technology":"getgrav/grav-plugin-form","known_exclusions":[],"conditions_summary":"### Summary\n(Tested on Form 9.0.3 released on April, 28th)\n\nThe Form plugin's file upload handler at `user/plugins/form/classes/Form.php:583` accepts a POST-supplied `filename` parameter (`$filename = $post['filename'] ?? $upload['file']['name']`) that overrides the original uploaded filename. The override passes through `Utils::checkFilename()`, which blocks only a narrow extension list (`.php*`, `.htm*`, `.js`, `.exe`). Markdown (`.md`) is **not** blocked.\n\nA page's directory under `user/pages/` contains its `.md` content file (e.g. `default.md`, `form.md`). When a form's file upload field has `accept: ['*']` (or any policy that admits text files), an unauthenticated visitor can:\n\n1. Upload **arbitrary content** with **`filename=form.md`** (or other page-content filenames),\n2. Submit the form to trigger `Form::copyFiles()`, which **overwrites the page's own `.md` file**.\n\n### Details\n**Vulnerable code path**\n\n`user/plugins/form/classes/Form.php:580-606` (in `uploadFiles()`):\n```php\n$grav->fireEvent('onFormUploadSettings', new Event(['settings' => &$settings, 'post' => $post]));\n\n$upload = json_decode(json_encode($this->normalizeFiles($_FILES['data'], $settings->name)), true);\n$fi","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 9.1.0"]}],"null_published_at":"2026-11-08T15:11:47.473Z","source_updated_at":"2026-05-13T14:04:35.000Z","source_disclosed_at":"2026-05-06T23:03:13.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:41.382Z"},{"id":"NVI-00006373","kind":"vulnerability","title":"Grav Form Plugin has an Anonymous Page Content Overwrite via Form File Upload filename Override","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w4rc-p66m-x6qq","CVE-2026-42845"],"plain_summary":"OSV carries this publisher advisory for getgrav/grav-plugin-form. 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 9.1.0 for getgrav/grav-plugin-form. Confirm the publisher’s latest guidance.","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"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-1ec6f8828f8b6a320f5d7960d0bf07af"],"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":"2026-11-03T12:00:27.000Z","value":"0.741%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.5468. Missing scores are unknown.","source_id":"sr-1ec6f8828f8b6a320f5d7960d0bf07af"}],"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-b227ec67657b72d4c46a3ddaca4e4253","url":"https://github.com/advisories/GHSA-w4rc-p66m-x6qq","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-w4rc-p66m-x6qq","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.382Z"},{"id":"sr-1ec6f8828f8b6a320f5d7960d0bf07af","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-2026-42845","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.784Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"technology":"getgrav/grav-plugin-form","known_exclusions":[],"conditions_summary":"### Summary\n(Tested on Form 9.0.3 released on April, 28th)\n\nThe Form plugin's file upload handler at `user/plugins/form/classes/Form.php:583` accepts a POST-supplied `filename` parameter (`$filename = $post['filename'] ?? $upload['file']['name']`) that overrides the original uploaded filename. The override passes through `Utils::checkFilename()`, which blocks only a narrow extension list (`.php*`, `.htm*`, `.js`, `.exe`). Markdown (`.md`) is **not** blocked.\n\nA page's directory under `user/pages/` contains its `.md` content file (e.g. `default.md`, `form.md`). When a form's file upload field has `accept: ['*']` (or any policy that admits text files), an unauthenticated visitor can:\n\n1. Upload **arbitrary content** with **`filename=form.md`** (or other page-content filenames),\n2. Submit the form to trigger `Form::copyFiles()`, which **overwrites the page's own `.md` file**.\n\n### Details\n**Vulnerable code path**\n\n`user/plugins/form/classes/Form.php:580-606` (in `uploadFiles()`):\n```php\n$grav->fireEvent('onFormUploadSettings', new Event(['settings' => &$settings, 'post' => $post]));\n\n$upload = json_decode(json_encode($this->normalizeFiles($_FILES['data'], $settings->name)), true);\n$fi","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 9.1.0"]}],"null_published_at":"2026-11-07T14:01:55.416Z","source_updated_at":"2026-05-13T14:16:34.399Z","source_disclosed_at":"2026-05-06T23:03:13.000Z","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":"2026-10-31T21:42:41.382Z"},{"id":"NVI-00006373","kind":"vulnerability","title":"Grav Form Plugin has an Anonymous Page Content Overwrite via Form File Upload filename Override","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w4rc-p66m-x6qq","CVE-2026-42845"],"plain_summary":"OSV carries this publisher advisory for getgrav/grav-plugin-form. 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 9.1.0 for getgrav/grav-plugin-form. Confirm the publisher’s latest guidance.","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"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-7c1a22fd7c1a82fb5721788fdd9bb1cd"],"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":"0.741%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.54648. Missing scores are unknown.","source_id":"sr-7c1a22fd7c1a82fb5721788fdd9bb1cd"}],"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-b227ec67657b72d4c46a3ddaca4e4253","url":"https://github.com/advisories/GHSA-w4rc-p66m-x6qq","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-w4rc-p66m-x6qq","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.382Z"},{"id":"sr-7c1a22fd7c1a82fb5721788fdd9bb1cd","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-2026-42845","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.378Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"technology":"getgrav/grav-plugin-form","known_exclusions":[],"conditions_summary":"### Summary\n(Tested on Form 9.0.3 released on April, 28th)\n\nThe Form plugin's file upload handler at `user/plugins/form/classes/Form.php:583` accepts a POST-supplied `filename` parameter (`$filename = $post['filename'] ?? $upload['file']['name']`) that overrides the original uploaded filename. The override passes through `Utils::checkFilename()`, which blocks only a narrow extension list (`.php*`, `.htm*`, `.js`, `.exe`). Markdown (`.md`) is **not** blocked.\n\nA page's directory under `user/pages/` contains its `.md` content file (e.g. `default.md`, `form.md`). When a form's file upload field has `accept: ['*']` (or any policy that admits text files), an unauthenticated visitor can:\n\n1. Upload **arbitrary content** with **`filename=form.md`** (or other page-content filenames),\n2. Submit the form to trigger `Form::copyFiles()`, which **overwrites the page's own `.md` file**.\n\n### Details\n**Vulnerable code path**\n\n`user/plugins/form/classes/Form.php:580-606` (in `uploadFiles()`):\n```php\n$grav->fireEvent('onFormUploadSettings', new Event(['settings' => &$settings, 'post' => $post]));\n\n$upload = json_decode(json_encode($this->normalizeFiles($_FILES['data'], $settings->name)), true);\n$fi","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 9.1.0"]}],"null_published_at":"2026-11-01T19:14:01.616Z","source_updated_at":"2026-05-13T14:16:34.399Z","source_disclosed_at":"2026-05-06T23:03:13.000Z","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":"2026-10-31T21:42:41.382Z"},{"id":"NVI-00006373","kind":"vulnerability","title":"Grav Form Plugin has an Anonymous Page Content Overwrite via Form File Upload filename Override","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w4rc-p66m-x6qq","CVE-2026-42845"],"plain_summary":"OSV carries this publisher advisory for getgrav/grav-plugin-form. 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 9.1.0 for getgrav/grav-plugin-form. Confirm the publisher’s latest guidance.","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"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-b227ec67657b72d4c46a3ddaca4e4253","url":"https://github.com/advisories/GHSA-w4rc-p66m-x6qq","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-w4rc-p66m-x6qq","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.382Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b227ec67657b72d4c46a3ddaca4e4253"],"technology":"getgrav/grav-plugin-form","known_exclusions":[],"conditions_summary":"### Summary\n(Tested on Form 9.0.3 released on April, 28th)\n\nThe Form plugin's file upload handler at `user/plugins/form/classes/Form.php:583` accepts a POST-supplied `filename` parameter (`$filename = $post['filename'] ?? $upload['file']['name']`) that overrides the original uploaded filename. The override passes through `Utils::checkFilename()`, which blocks only a narrow extension list (`.php*`, `.htm*`, `.js`, `.exe`). Markdown (`.md`) is **not** blocked.\n\nA page's directory under `user/pages/` contains its `.md` content file (e.g. `default.md`, `form.md`). When a form's file upload field has `accept: ['*']` (or any policy that admits text files), an unauthenticated visitor can:\n\n1. Upload **arbitrary content** with **`filename=form.md`** (or other page-content filenames),\n2. Submit the form to trigger `Form::copyFiles()`, which **overwrites the page's own `.md` file**.\n\n### Details\n**Vulnerable code path**\n\n`user/plugins/form/classes/Form.php:580-606` (in `uploadFiles()`):\n```php\n$grav->fireEvent('onFormUploadSettings', new Event(['settings' => &$settings, 'post' => $post]));\n\n$upload = json_decode(json_encode($this->normalizeFiles($_FILES['data'], $settings->name)), true);\n$fi","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 9.1.0"]}],"null_published_at":"2026-10-31T22:13:10.054Z","source_updated_at":"2026-05-13T14:16:34.399Z","source_disclosed_at":"2026-05-06T23:03:13.000Z","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":"2026-10-31T21:42:41.382Z"}],"next_cursor":null,"snapshot_revision":"42594"}