Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck
CVE-2026-121732RosarioSIS before 12.9 Improper Authorization via Student Billing Mass Assignment
Low 2.7
In plain English
A low-severity authorization bypass via user-controlled key in RosarioSIS from francoisjacquet. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| francoisjacquet | RosarioSIS | 0 – before 12.9 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
References
- Patch Commit patch
- https://github.com/francoisjacquet/rosariosis product
- https://gitlab.com/francoisjacquet/rosariosis/-/issues/376 issue-tracking
- https://github.com/francoisjacquet/rosariosis/blob/v12.8.1/modules/Student_Billing/MassAssignFees.php#L15 technical-description
- https://github.com/francoisjacquet/rosariosis/blob/v12.8.1/modules/Student_Billing/MassAssignPayments.php#L16 technical-description
- RosarioSIS v12.9 Release Notes release-notes
- VulnCheck Advisory: RosarioSIS before 12.9 Improper Authorization via Student Billing Mass Assignment third-party-advisory