{"affected":[{"product":"InvoicePlane","source":"CNA: GitHub_M","vendor":"InvoicePlane","versions":[{"status":"affected","version":"< 1.7.2-beta-1"}]}],"cveId":"CVE-2026-55561","cwes":["CWE-639"],"description":"InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2-beta-1, guest users can approve or reject quotes belonging to any client, not just their assigned clients. The `approve()` and `reject()` methods in the Guest Quotes controller, `application/modules/guest/controllers/Quotes.php`, call `approve_quote_by_id($quote_id)` and `reject_quote_by_id($quote_id)` directly without the `where_in('ip_quotes.client_id', $this->user_clients)` scoping that sibling methods use. A guest user assigned to one client can change another client's quote status by supplying sequential integer `quote_id` values, and `email_quote_status()` also sends notification emails. Additionally, `generate_pdf()` calls `mark_viewed($quote_id)` before checking the client scope, allowing a guest user to mark another client's quote as viewed. These issues are fixed in version 1.7.2-beta-1 and the subsequent stable version 1.7.2.","epss":{"date":"2026-11-02","percentile":0.19918,"score":0.00275},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/InvoicePlane/InvoicePlane/security/advisories/GHSA-6xj3-274m-4mvg"}],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}],"modifiedAt":1793664831395,"publishedAt":1793226827140,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/InvoicePlane/InvoicePlane/security/advisories/GHSA-6xj3-274m-4mvg"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/InvoicePlane/InvoicePlane/pull/1413"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/InvoicePlane/InvoicePlane/pull/1471"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/InvoicePlane/InvoicePlane/commit/424dc44eb54030b93176bb08cba07ba12d7ae451"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/InvoicePlane/InvoicePlane/commit/fca7792a24de0a749d881cbbe4af6f58e9545d20"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/InvoicePlane/InvoicePlane/releases/tag/v1.7.2"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/InvoicePlane/InvoicePlane/releases/tag/v1.7.2-beta-1"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/InvoicePlane/InvoicePlane/security/advisories/GHSA-6xj3-274m-4mvg"}],"remediation":[],"revision":"897b5be57a74551f0202f1a916e7bb616b5867f916a5eea2c3df373031ef5b61","sources":[{"modifiedAt":1793664831395,"name":"CNA: GitHub_M","retrievedAt":1793668145221,"url":"https://www.cve.org/CVERecord?id=CVE-2026-55561"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793668152214,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-55561"}],"ssvc":{"assessedAt":1793664801566,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"InvoicePlane: Guest user IDOR in quote approval and rejection","updatedAt":1793668152214}