{"items":[{"id":"NVI-00005543","kind":"vulnerability","title":"Duplicate Advisory: Grav: Single invalid UTF-8 byte disables every rule in Security::detectXss(), bypassing the page-content XSS safety gate","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"withdrawn","identifiers":["GHSA-993v-76jg-67xr"],"plain_summary":"OSV carries this publisher advisory for getgrav/grav. This is an aggregated source copy; consult the original publisher and compare update dates.","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-93c6aa8840b0c332e01232c1e884c75c"],"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":[],"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-93c6aa8840b0c332e01232c1e884c75c","url":"https://github.com/advisories/GHSA-993v-76jg-67xr","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-993v-76jg-67xr","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:10.683Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-93c6aa8840b0c332e01232c1e884c75c"],"technology":"getgrav/grav","known_exclusions":[],"conditions_summary":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-q2j8-x8hf-63ch. This link is maintained to preserve external references.\n\n### Original Description\nGrav before 2.0.14 contains a stored cross-site scripting vulnerability in the Security::detectXss() function (system/src/Grav/Common/Security.php). All XSS detection patterns use the PCRE /u (UTF-8) modifier, so a single invalid UTF-8 byte anywhere in page content causes preg_match() to return false for every pattern, silently bypassing the save-time XSS safety gate (Validation::checkSafety()). An authenticated attacker with page-edit permissions (without the security.xss_whitelist privilege) can store malicious JavaScript that executes in the browser of a visitor who views the affected page.","public_affected_ranges":["ECOSYSTEM: introduced 0"]}],"null_published_at":"2026-10-31T22:13:01.469Z","source_updated_at":"2026-09-17T21:00:04.123Z","source_disclosed_at":"2026-08-18T12:31:22.000Z","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":"2026-10-31T21:42:10.683Z"}],"next_cursor":null,"snapshot_revision":"42594"}