{"id":"CVE-2026-121732","kind":"vulnerability","aliases":["CVE-2026-121732"],"related":[],"title":"RosarioSIS: school admins can bill students of other schools","description":"RosarioSIS before 12.9 contains an improper authorization vulnerability that allows school-scoped administrators to assign fees and payments to students of other schools via MassAssignFees.php and MassAssignPayments.php. Attackers can substitute foreign student IDs in the student[] POST array of a modfunc=save request to alter other schools' student billing balances, breaking school isolation.","summary":"RosarioSIS before 12.9 lets a school-scoped administrator assign fees and payments to students at other schools by substituting foreign student IDs in a POST request to the mass-assign fee and payment pages. An attacker can change other schools' student billing balances, which breaks the isolation between schools.","severity":"low","cvss":2.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["education","package","rosariosis","self-hosted"],"not_affected_if":["managed-hosting","single-school-install"],"how_to_check":"- Check the installed RosarioSIS version and see whether it is below `12.9`\n- Review whether more than one school shares the same installation, since the flaw only crosses school boundaries","fix":"- RosarioSIS: move to `12.9` or later (per the NVD description, fixed in 12.9)","status":"open","published_at":"2026-11-03T23:17:36+00:00","first_seen_at":"2026-11-03T23:45:15+00:00","triaged_at":"2026-11-03T23:46:00+00:00","updated_at":"2026-11-03T23:46:00+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-03T23:46:00Z","model":"claude-haiku-5-5","output":{"fix":"- RosarioSIS: move to `12.9` or later (per the NVD description, fixed in 12.9)","reach":"network","title":"RosarioSIS: school admins can bill students of other schools","impact":"medium","summary":"RosarioSIS before 12.9 lets a school-scoped administrator assign fees and payments to students at other schools by substituting foreign student IDs in a POST request to the mass-assign fee and payment pages. An attacker can change other schools' student billing balances, which breaks the isolation between schools.","audience":"businesses","category":"package","nicknames":[],"who_cares":["rosariosis","self-hosted","education"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"School admin alters billing balances of students at other schools","analyst_note":"","how_to_check":"- Check the installed RosarioSIS version and see whether it is below `12.9`\n- Review whether more than one school shares the same installation, since the flaw only crosses school boundaries","plain_action":"","needs_analyst":false,"not_affected_if":["single-school-install","managed-hosting"],"who_is_affected":"Schools that run RosarioSIS with more than one school in the same installation and give school-scoped administrator accounts access to the fee and payment mass-assign functions. A single-school installation or one where only fully trusted administrators can log in is less exposed. unknown whether the sources describe further conditions.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000682,"input_tokens":4200,"output_tokens":523,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-121732':12A,15A '-2026':11A,14A '12.9':24B,75C 'admin':3A 'administr':30B,86C 'allow':82C 'alter':118C 'array':111C 'assign':31B,53B,88C 'attack':59B,101C 'author':79C 'balanc':66B,123C 'bill':5A,65B,122C 'break':68B,124C 'chang':61B 'contain':76C 'cve':10A,13A 'educ':16B 'fee':32B,54B,89C 'foreign':42B,104C 'host':21B 'id':44B,106C 'improp':78C 'isol':70B,126C 'let':25B 'mass':52B 'mass-assign':51B 'massassignfees.php':98C 'massassignpayments.php':100C 'modfunc':114C 'packag':17B 'page':57B 'payment':34B,56B,91C 'post':47B,110C 'request':48B,116C 'rosariosi':1A,18B,22B,73C 'save':115C 'school':2A,9A,28B,39B,63B,72B,84C,96C,120C,125C 'school-scop':27B,83C 'scope':29B,85C 'self':20B 'self-host':19B 'student':6A,36B,43B,64B,93C,105C,109C,121C 'substitut':41B,103C 'via':97C 'vulner':80C","nicknames":[],"mitigations":[],"who_affected":"Schools that run RosarioSIS with more than one school in the same installation and give school-scoped administrator accounts access to the fee and payment mass-assign functions. A single-school installation or one where only fully trusted administrators can log in is less exposed. unknown whether the sources describe further conditions.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["education","low","package","rosariosis","selfhosted"],"campaign_type":null,"first_public_at":"2026-11-03T23:17:36+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121732","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121732","severity":null,"published_at":"2026-11-03T23:17:36+00:00","modified_at":"2026-11-03T23:17:37+00:00","first_seen_at":"2026-11-03T23:45:15+00:00","fetched_at":"2026-11-03T23:45:15+00:00","note":null}],"documents":[{"id":61677,"url":"https://github.com/francoisjacquet/rosariosis/commit/a8bb460aacb11661934e6e91fbe0d8158fbc0c4f","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":61674,"url":"https://github.com/francoisjacquet/rosariosis/releases/tag/v12.9","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":61679,"url":"https://www.vulncheck.com/advisories/rosariosis-before-12.9-improper-authorization-via-student-billing-mass-assignment","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}