{"items":[{"id":"NVI-00006081","kind":"vulnerability","title":"YesWiki has Unauthenticated Server-Side Request Forgery via ActivityPub `Signature.keyId`","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vw42-752g-5mrp","CVE-2026-52769"],"plain_summary":"OSV carries this publisher advisory for yeswiki/yeswiki. 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 4.6.6 for yeswiki/yeswiki. Confirm the publisher’s latest guidance.","source_ids":["sr-a6bb9d71f17ca741eb7527c873733f76"],"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-0ac49d6a39fd3040d3daa9eff0d8c2b4"],"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":"2026-11-04T12:03:12.000Z","value":"0.487%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.4203. Missing scores are unknown.","source_id":"sr-0ac49d6a39fd3040d3daa9eff0d8c2b4"}],"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-a6bb9d71f17ca741eb7527c873733f76","url":"https://github.com/advisories/GHSA-vw42-752g-5mrp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-vw42-752g-5mrp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.379Z"},{"id":"sr-0ac49d6a39fd3040d3daa9eff0d8c2b4","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-2026-52769","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:58:50.330Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a6bb9d71f17ca741eb7527c873733f76"],"technology":"yeswiki/yeswiki","known_exclusions":[],"conditions_summary":"## Summary\nThe `POST /api/forms/{formId}/actor/inbox` route - exposed publicly with `acl:\"public\"` - accepts an HTTP `Signature` header whose `keyId` parameter is a URL. `HttpSignatureService::verifySignature()` parses the header and **immediately makes a server-side HTTP GET** to that URL, **before** any cryptographic verification or URL validation. An unauthenticated remote attacker can therefore make YesWiki issue arbitrary outbound HTTP requests to any host the server can reach - internal services, cloud-metadata endpoints (`169.254.169.254`), intranet-only admin panels, etc. - and read enough back via timing and error-message oracles to scan ports, enumerate services, and (on a real cloud instance) reach IAM metadata.\n\nThe only deployment-side precondition is that **ActivityPub be enabled on at least one Bazar form** (`bn_activitypub_enable = '1'`).\n\n## Details\n### Affected component\n\n* **File:** `tools/bazar/services/HttpSignatureService.php`\n* **Method:** `HttpSignatureService::verifySignature(Request $request)`\n* **Sink:** line **96**\n* **Route:** `tools/bazar/controllers/ApiController.php` line **125** — `@Route(\"/api/forms/{formId}/actor/inbox\", methods={\"POST\"}, options=","public_affected_ranges":["ECOSYSTEM: introduced 4.6.2; fixed 4.6.6"]}],"null_published_at":"2026-11-07T14:01:58.748Z","source_updated_at":"2026-07-09T21:11:39.369Z","source_disclosed_at":"2026-07-09T20:58:33.000Z","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":"2026-10-31T21:42:41.379Z"},{"id":"NVI-00006081","kind":"vulnerability","title":"YesWiki has Unauthenticated Server-Side Request Forgery via ActivityPub `Signature.keyId`","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vw42-752g-5mrp","CVE-2026-52769"],"plain_summary":"OSV carries this publisher advisory for yeswiki/yeswiki. 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 4.6.6 for yeswiki/yeswiki. Confirm the publisher’s latest guidance.","source_ids":["sr-a6bb9d71f17ca741eb7527c873733f76"],"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-1530671e832c88311ba1a605bcd1f3a0"],"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":"2026-11-02T12:00:30.000Z","value":"0.487%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.419. Missing scores are unknown.","source_id":"sr-1530671e832c88311ba1a605bcd1f3a0"}],"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-a6bb9d71f17ca741eb7527c873733f76","url":"https://github.com/advisories/GHSA-vw42-752g-5mrp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-vw42-752g-5mrp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.379Z"},{"id":"sr-1530671e832c88311ba1a605bcd1f3a0","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-2026-52769","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.856Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a6bb9d71f17ca741eb7527c873733f76"],"technology":"yeswiki/yeswiki","known_exclusions":[],"conditions_summary":"## Summary\nThe `POST /api/forms/{formId}/actor/inbox` route - exposed publicly with `acl:\"public\"` - accepts an HTTP `Signature` header whose `keyId` parameter is a URL. `HttpSignatureService::verifySignature()` parses the header and **immediately makes a server-side HTTP GET** to that URL, **before** any cryptographic verification or URL validation. An unauthenticated remote attacker can therefore make YesWiki issue arbitrary outbound HTTP requests to any host the server can reach - internal services, cloud-metadata endpoints (`169.254.169.254`), intranet-only admin panels, etc. - and read enough back via timing and error-message oracles to scan ports, enumerate services, and (on a real cloud instance) reach IAM metadata.\n\nThe only deployment-side precondition is that **ActivityPub be enabled on at least one Bazar form** (`bn_activitypub_enable = '1'`).\n\n## Details\n### Affected component\n\n* **File:** `tools/bazar/services/HttpSignatureService.php`\n* **Method:** `HttpSignatureService::verifySignature(Request $request)`\n* **Sink:** line **96**\n* **Route:** `tools/bazar/controllers/ApiController.php` line **125** — `@Route(\"/api/forms/{formId}/actor/inbox\", methods={\"POST\"}, options=","public_affected_ranges":["ECOSYSTEM: introduced 4.6.2; fixed 4.6.6"]}],"null_published_at":"2026-11-04T10:04:47.620Z","source_updated_at":"2026-07-09T21:11:39.369Z","source_disclosed_at":"2026-07-09T20:58:33.000Z","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":"2026-10-31T21:42:41.379Z"},{"id":"NVI-00006081","kind":"vulnerability","title":"YesWiki has Unauthenticated Server-Side Request Forgery via ActivityPub `Signature.keyId`","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vw42-752g-5mrp","CVE-2026-52769"],"plain_summary":"OSV carries this publisher advisory for yeswiki/yeswiki. 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 4.6.6 for yeswiki/yeswiki. Confirm the publisher’s latest guidance.","source_ids":["sr-a6bb9d71f17ca741eb7527c873733f76"],"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-a6bb9d71f17ca741eb7527c873733f76","url":"https://github.com/advisories/GHSA-vw42-752g-5mrp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-vw42-752g-5mrp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.379Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a6bb9d71f17ca741eb7527c873733f76"],"technology":"yeswiki/yeswiki","known_exclusions":[],"conditions_summary":"## Summary\nThe `POST /api/forms/{formId}/actor/inbox` route - exposed publicly with `acl:\"public\"` - accepts an HTTP `Signature` header whose `keyId` parameter is a URL. `HttpSignatureService::verifySignature()` parses the header and **immediately makes a server-side HTTP GET** to that URL, **before** any cryptographic verification or URL validation. An unauthenticated remote attacker can therefore make YesWiki issue arbitrary outbound HTTP requests to any host the server can reach - internal services, cloud-metadata endpoints (`169.254.169.254`), intranet-only admin panels, etc. - and read enough back via timing and error-message oracles to scan ports, enumerate services, and (on a real cloud instance) reach IAM metadata.\n\nThe only deployment-side precondition is that **ActivityPub be enabled on at least one Bazar form** (`bn_activitypub_enable = '1'`).\n\n## Details\n### Affected component\n\n* **File:** `tools/bazar/services/HttpSignatureService.php`\n* **Method:** `HttpSignatureService::verifySignature(Request $request)`\n* **Sink:** line **96**\n* **Route:** `tools/bazar/controllers/ApiController.php` line **125** — `@Route(\"/api/forms/{formId}/actor/inbox\", methods={\"POST\"}, options=","public_affected_ranges":["ECOSYSTEM: introduced 4.6.2; fixed 4.6.6"]}],"null_published_at":"2026-10-31T22:13:05.858Z","source_updated_at":"2026-07-09T21:11:39.369Z","source_disclosed_at":"2026-07-09T20:58:33.000Z","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":"2026-10-31T21:42:41.379Z"}],"next_cursor":null,"snapshot_revision":"42594"}