{"items":[{"id":"NVI-00005945","kind":"vulnerability","title":"YesWiki vulnerable to unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-6x7x-gcmf-7r8x","CVE-2026-52766"],"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-a2269856779cd26563dc507d61b9671b"],"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-af4e8534d71a93f13d4c7609bb0b8122"],"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":"CVSS","as_of":"2026-09-09T17:17:22.047Z","value":"9.1 CRITICAL (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-8e268567cdf2cd83ed99ea3a7f5062cb"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.579%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.47648. Missing scores are unknown.","source_id":"sr-af4e8534d71a93f13d4c7609bb0b8122"}],"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-a2269856779cd26563dc507d61b9671b","url":"https://github.com/advisories/GHSA-6x7x-gcmf-7r8x","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-6x7x-gcmf-7r8x","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.941Z"},{"id":"sr-8e268567cdf2cd83ed99ea3a7f5062cb","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52766","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-52766","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:31.710Z"},{"id":"sr-af4e8534d71a93f13d4c7609bb0b8122","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-2026-52766","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.382Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a2269856779cd26563dc507d61b9671b"],"technology":"yeswiki/yeswiki","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `{{erasespamedcomments}}` wiki action (`actions/EraseSpamedCommentsAction.php`) accepts a `suppr[]` array from `POST` and deletes every wiki page whose tag appears in that array, with no authorization check anywhere in the action body or in the page-deletion path it invokes. Combined with YesWiki's allow-by-default action ACL model, any user who has page write access, which is the default for everyone (`default_write_acl='*'`) on a fresh install can permanently delete arbitrary wiki pages, including the front page, admin pages, and pages owned by other users.\n\nThe action's `delete()` callee is `PageManager::deleteOrphaned()`, which despite its name does not check whether the target page is orphaned: it issues an unconditional `DELETE` against `pages`, `links`, `acls`, `triples`, `referrers`, and `tags` tables.\n\n### Details\n\nThree issues compose the vulnerability.\n\n1. `actions/EraseSpamedCommentsAction.php` performs no authorization check before processing `$_POST['clean']` / `$_POST['suppr'][]` in `actions/EraseSpamedCommentsAction.php`:\n\n   ```php\n   public function run()\n   {\n       $wiki = &$this->wiki;\n       ob_start();\n       // ...\n       elseif (isset($_POS","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 4.6.6"]}],"null_published_at":"2026-11-05T03:52:54.770Z","source_updated_at":"2026-07-09T21:11:39.436Z","source_disclosed_at":"2026-07-09T20:57:25.000Z","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":"2026-10-31T21:41:59.941Z"},{"id":"NVI-00005945","kind":"vulnerability","title":"YesWiki vulnerable to unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-6x7x-gcmf-7r8x","CVE-2026-52766"],"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-a2269856779cd26563dc507d61b9671b"],"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-8e268567cdf2cd83ed99ea3a7f5062cb"],"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":"CVSS","as_of":"2026-09-09T17:17:22.047Z","value":"9.1 CRITICAL (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-8e268567cdf2cd83ed99ea3a7f5062cb"}],"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-a2269856779cd26563dc507d61b9671b","url":"https://github.com/advisories/GHSA-6x7x-gcmf-7r8x","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-6x7x-gcmf-7r8x","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.941Z"},{"id":"sr-8e268567cdf2cd83ed99ea3a7f5062cb","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52766","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-52766","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:31.710Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a2269856779cd26563dc507d61b9671b"],"technology":"yeswiki/yeswiki","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `{{erasespamedcomments}}` wiki action (`actions/EraseSpamedCommentsAction.php`) accepts a `suppr[]` array from `POST` and deletes every wiki page whose tag appears in that array, with no authorization check anywhere in the action body or in the page-deletion path it invokes. Combined with YesWiki's allow-by-default action ACL model, any user who has page write access, which is the default for everyone (`default_write_acl='*'`) on a fresh install can permanently delete arbitrary wiki pages, including the front page, admin pages, and pages owned by other users.\n\nThe action's `delete()` callee is `PageManager::deleteOrphaned()`, which despite its name does not check whether the target page is orphaned: it issues an unconditional `DELETE` against `pages`, `links`, `acls`, `triples`, `referrers`, and `tags` tables.\n\n### Details\n\nThree issues compose the vulnerability.\n\n1. `actions/EraseSpamedCommentsAction.php` performs no authorization check before processing `$_POST['clean']` / `$_POST['suppr'][]` in `actions/EraseSpamedCommentsAction.php`:\n\n   ```php\n   public function run()\n   {\n       $wiki = &$this->wiki;\n       ob_start();\n       // ...\n       elseif (isset($_POS","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 4.6.6"]}],"null_published_at":"2026-11-03T17:49:21.370Z","source_updated_at":"2026-07-09T21:11:39.436Z","source_disclosed_at":"2026-07-09T20:57:25.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:41:59.941Z"},{"id":"NVI-00005945","kind":"vulnerability","title":"YesWiki vulnerable to unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-6x7x-gcmf-7r8x","CVE-2026-52766"],"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-a2269856779cd26563dc507d61b9671b"],"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-a2269856779cd26563dc507d61b9671b","url":"https://github.com/advisories/GHSA-6x7x-gcmf-7r8x","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-6x7x-gcmf-7r8x","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.941Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a2269856779cd26563dc507d61b9671b"],"technology":"yeswiki/yeswiki","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `{{erasespamedcomments}}` wiki action (`actions/EraseSpamedCommentsAction.php`) accepts a `suppr[]` array from `POST` and deletes every wiki page whose tag appears in that array, with no authorization check anywhere in the action body or in the page-deletion path it invokes. Combined with YesWiki's allow-by-default action ACL model, any user who has page write access, which is the default for everyone (`default_write_acl='*'`) on a fresh install can permanently delete arbitrary wiki pages, including the front page, admin pages, and pages owned by other users.\n\nThe action's `delete()` callee is `PageManager::deleteOrphaned()`, which despite its name does not check whether the target page is orphaned: it issues an unconditional `DELETE` against `pages`, `links`, `acls`, `triples`, `referrers`, and `tags` tables.\n\n### Details\n\nThree issues compose the vulnerability.\n\n1. `actions/EraseSpamedCommentsAction.php` performs no authorization check before processing `$_POST['clean']` / `$_POST['suppr'][]` in `actions/EraseSpamedCommentsAction.php`:\n\n   ```php\n   public function run()\n   {\n       $wiki = &$this->wiki;\n       ob_start();\n       // ...\n       elseif (isset($_POS","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 4.6.6"]}],"null_published_at":"2026-10-31T22:13:05.853Z","source_updated_at":"2026-07-09T21:11:39.436Z","source_disclosed_at":"2026-07-09T20:57:25.000Z","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":"2026-10-31T21:41:59.941Z"}],"next_cursor":null,"snapshot_revision":"42594"}