{"items":[{"id":"NVI-00007387","kind":"vulnerability","title":"solspace/craft-freeform Vulnerable to XSS in `PhpSpreadsheet` HTML Writer Due to Unsanitized Styling Data","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-44jg-mv3h-wj6g"],"plain_summary":"OSV carries this publisher advisory for solspace/craft-freeform. 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 4.1.23 for solspace/craft-freeform. Confirm the publisher’s latest guidance.","source_ids":["sr-d9e45e4b75c2e56cb09eed977d2dfc74"],"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-d9e45e4b75c2e56cb09eed977d2dfc74","url":"https://github.com/advisories/GHSA-44jg-mv3h-wj6g","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-44jg-mv3h-wj6g","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:49.663Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-d9e45e4b75c2e56cb09eed977d2dfc74"],"technology":"solspace/craft-freeform","known_exclusions":[],"conditions_summary":"### Summary\n_Short summary of the problem. Make the impact and severity as clear as possible. For example: An unsafe deserialization vulnerability allows any unauthenticated user to execute arbitrary code on the server._\n\n\\PhpOffice\\PhpSpreadsheet\\Writer\\Html doesn't sanitize spreadsheet styling information such as font names, allowing an attacker to inject arbitrary JavaScript on the page.\n\n### Details\n_Give all details on the vulnerability. Pointing to the incriminated source code is very helpful for the maintainer._\n\nSee https://github.com/advisories/GHSA-wgmf-q9vr-vww6\n\n### PoC\n_Complete instructions, including specific configuration details, to reproduce the vulnerability._\n\nExample target script:\n\n```\nload(__DIR__ . '/book.xlsx');\n\n$writer = new \\PhpOffice\\PhpSpreadsheet\\Writer\\Html($spreadsheet);\nprint($writer->generateHTMLAll());\n```\n\nSave this file in the same directory:\n\nbook.xlsx\n\nOpen index.php in a web browser. An alert should be displayed.\n\n### Impact\n_What kind of vu","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 4.1.23"]}],"null_published_at":"2026-10-31T22:13:14.335Z","source_updated_at":"2026-02-03T03:17:27.874Z","source_disclosed_at":"2026-01-15T22:40:42.000Z","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":"2026-10-31T21:41:49.663Z"}],"next_cursor":null,"snapshot_revision":"40769"}