{"items":[{"id":"NVI-00004064","kind":"vulnerability","title":"Flarum post mentions can be used to read any post on the forum without access control","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-22m9-m3ww-53h3","CVE-2023-22487"],"plain_summary":"OSV carries this publisher advisory for flarum/mentions. 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 1.6.3 for flarum/mentions. Confirm the publisher’s latest guidance.","source_ids":["sr-5662d0a9fba4d150b392d08c8064fd6b"],"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-98a954e3ccb4954ad48c4f819091479a"],"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":"0.685%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.52606. Missing scores are unknown.","source_id":"sr-98a954e3ccb4954ad48c4f819091479a"}],"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-5662d0a9fba4d150b392d08c8064fd6b","url":"https://github.com/advisories/GHSA-22m9-m3ww-53h3","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-22m9-m3ww-53h3","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:40.008Z"},{"id":"sr-98a954e3ccb4954ad48c4f819091479a","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-2023-22487","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:03.704Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5662d0a9fba4d150b392d08c8064fd6b"],"technology":"flarum/mentions","known_exclusions":[],"conditions_summary":"Using the mentions feature provided by the flarum/mentions extension, users can mention any post ID on the forum with the special `@\"\"#p` syntax.\n\nThe following behavior never changes no matter if the actor should be able to read the mentioned post or not:\n\nA URL to the mentioned post is inserted into the actor post HTML, leaking its discussion ID and post number.\n\nThe `mentionsPosts` relationship included in the `POST /api/posts` and `PATCH /api/posts/` JSON responses leaks the full JSON:API payload of all mentioned posts without any access control. This includes the content, date, number and attributes added by other extensions.\n\nAn attacker only needs the ability to create new posts on the forum to exploit the vulnerability. This works even if new posts require approval. If they have the ability to edit posts, the attack can be performed even more discreetly by using a single post to scan any size of database and hiding the attack post content afterward.\n\n### Impact\nThe attack allows the leaking of all posts in the forum database, including posts awaiting approval, posts in tags the user has no access to, and private discussions created by other extensions like","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.6.3"]}],"null_published_at":"2026-11-04T02:53:03.155Z","source_updated_at":"2026-09-10T03:49:50.825Z","source_disclosed_at":"2023-01-10T22:19:49.000Z","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":"2026-10-31T21:41:40.008Z"},{"id":"NVI-00004064","kind":"vulnerability","title":"Flarum post mentions can be used to read any post on the forum without access control","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-22m9-m3ww-53h3","CVE-2023-22487"],"plain_summary":"OSV carries this publisher advisory for flarum/mentions. 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 1.6.3 for flarum/mentions. Confirm the publisher’s latest guidance.","source_ids":["sr-5662d0a9fba4d150b392d08c8064fd6b"],"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-5662d0a9fba4d150b392d08c8064fd6b","url":"https://github.com/advisories/GHSA-22m9-m3ww-53h3","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-22m9-m3ww-53h3","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:40.008Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5662d0a9fba4d150b392d08c8064fd6b"],"technology":"flarum/mentions","known_exclusions":[],"conditions_summary":"Using the mentions feature provided by the flarum/mentions extension, users can mention any post ID on the forum with the special `@\"\"#p` syntax.\n\nThe following behavior never changes no matter if the actor should be able to read the mentioned post or not:\n\nA URL to the mentioned post is inserted into the actor post HTML, leaking its discussion ID and post number.\n\nThe `mentionsPosts` relationship included in the `POST /api/posts` and `PATCH /api/posts/` JSON responses leaks the full JSON:API payload of all mentioned posts without any access control. This includes the content, date, number and attributes added by other extensions.\n\nAn attacker only needs the ability to create new posts on the forum to exploit the vulnerability. This works even if new posts require approval. If they have the ability to edit posts, the attack can be performed even more discreetly by using a single post to scan any size of database and hiding the attack post content afterward.\n\n### Impact\nThe attack allows the leaking of all posts in the forum database, including posts awaiting approval, posts in tags the user has no access to, and private discussions created by other extensions like","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.6.3"]}],"null_published_at":"2026-10-31T22:12:52.615Z","source_updated_at":"2026-09-10T03:49:50.825Z","source_disclosed_at":"2023-01-10T22:19:49.000Z","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":"2026-10-31T21:41:40.008Z"}],"next_cursor":null,"snapshot_revision":"42594"}