{"items":[{"id":"NVI-00005601","kind":"vulnerability","title":"Unauthenticated Information Disclosure (IDOR) via Multisite switch_to_blog in My Calendar","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-2mvx-f5qm-v2ch","CVE-2026-40308"],"plain_summary":"OSV carries this publisher advisory for joedolson/my-calendar. 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 3.7.7 for joedolson/my-calendar. Confirm the publisher’s latest guidance.","source_ids":["sr-956e45df2903e096865367b3f4b1d40e"],"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-609270f207e65f696c6dc66261324daf"],"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":"0.932%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.60692. Missing scores are unknown.","source_id":"sr-609270f207e65f696c6dc66261324daf"}],"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-956e45df2903e096865367b3f4b1d40e","url":"https://github.com/advisories/GHSA-2mvx-f5qm-v2ch","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-2mvx-f5qm-v2ch","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:49.642Z"},{"id":"sr-609270f207e65f696c6dc66261324daf","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-2026-40308","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.378Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-956e45df2903e096865367b3f4b1d40e"],"technology":"joedolson/my-calendar","known_exclusions":[],"conditions_summary":"### Summary\n\nAn unauthenticated Insecure Direct Object Reference (IDOR) and Denial of Service (DoS) vulnerability in the My Calendar plugin allows any unauthenticated user to extract calendar events (including private or hidden ones) from any sub-site on a WordPress Multisite network. On standard Single Site WordPress installations, this same endpoint crashes the PHP worker thread, creating an unauthenticated Denial of Service (DoS) vector.\n\n### Details\n\nThe vulnerability stems from the `mc_ajax_mcjs_action AJAX` function, which handles the `mcjs_action` endpoint. This endpoint is explicitly registered for unauthenticated users:\n```php\n<?php\n// In my-calendar-ajax.php\nadd_action( 'wp_ajax_nopriv_mcjs_action', 'mc_ajax_mcjs_action' );\n```\n\nWhen the behavior parameter is set to loadupcoming, the plugin accepts an args parameter from the $_REQUEST array. Instead of validating specific expected arguments, the plugin unsafely passes the entire string into PHP's parse_str() function:\n```php\n<?php\n$request = isset( $_REQUEST['args'] ) ? wp_unslash( sanitize_text_field( $_REQUEST['args'] ) ) : array();\n$request = str_replace( '|', '&', $request );\n$request = parse_str( $request, $args );\n/","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 3.7.7"]}],"null_published_at":"2026-11-01T01:45:38.533Z","source_updated_at":"2026-04-16T21:56:27.392Z","source_disclosed_at":"2026-04-16T21:34:40.000Z","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":"2026-10-31T21:41:49.642Z"},{"id":"NVI-00005601","kind":"vulnerability","title":"Unauthenticated Information Disclosure (IDOR) via Multisite switch_to_blog in My Calendar","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-2mvx-f5qm-v2ch","CVE-2026-40308"],"plain_summary":"OSV carries this publisher advisory for joedolson/my-calendar. 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 3.7.7 for joedolson/my-calendar. Confirm the publisher’s latest guidance.","source_ids":["sr-956e45df2903e096865367b3f4b1d40e"],"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-956e45df2903e096865367b3f4b1d40e","url":"https://github.com/advisories/GHSA-2mvx-f5qm-v2ch","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-2mvx-f5qm-v2ch","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:49.642Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-956e45df2903e096865367b3f4b1d40e"],"technology":"joedolson/my-calendar","known_exclusions":[],"conditions_summary":"### Summary\n\nAn unauthenticated Insecure Direct Object Reference (IDOR) and Denial of Service (DoS) vulnerability in the My Calendar plugin allows any unauthenticated user to extract calendar events (including private or hidden ones) from any sub-site on a WordPress Multisite network. On standard Single Site WordPress installations, this same endpoint crashes the PHP worker thread, creating an unauthenticated Denial of Service (DoS) vector.\n\n### Details\n\nThe vulnerability stems from the `mc_ajax_mcjs_action AJAX` function, which handles the `mcjs_action` endpoint. This endpoint is explicitly registered for unauthenticated users:\n```php\n<?php\n// In my-calendar-ajax.php\nadd_action( 'wp_ajax_nopriv_mcjs_action', 'mc_ajax_mcjs_action' );\n```\n\nWhen the behavior parameter is set to loadupcoming, the plugin accepts an args parameter from the $_REQUEST array. Instead of validating specific expected arguments, the plugin unsafely passes the entire string into PHP's parse_str() function:\n```php\n<?php\n$request = isset( $_REQUEST['args'] ) ? wp_unslash( sanitize_text_field( $_REQUEST['args'] ) ) : array();\n$request = str_replace( '|', '&', $request );\n$request = parse_str( $request, $args );\n/","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 3.7.7"]}],"null_published_at":"2026-10-31T22:13:01.471Z","source_updated_at":"2026-04-16T21:56:27.392Z","source_disclosed_at":"2026-04-16T21:34:40.000Z","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":"2026-10-31T21:41:49.642Z"}],"next_cursor":null,"snapshot_revision":"42594"}