Auth bypass in Francoisjacquet Rosariosis
CVE-2026-121732
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/francoisjacquet/rosariosis/commit/a8bb460aacb11661934e6e91fbe0d8158f… (patch)
- github.com/francoisjacquet/rosariosis (product)
- gitlab.com/francoisjacquet/rosariosis/-/issues/376 (issue-tracking)
- github.com/francoisjacquet/rosariosis/blob/v12.8.1/modules/Student_Billing/Mass… (technical-description)
- github.com/francoisjacquet/rosariosis/blob/v12.8.1/modules/Student_Billing/Mass… (technical-description)
- github.com/francoisjacquet/rosariosis/releases/tag/v12.9 (release-notes)
- www.vulncheck.com/advisories/rosariosis-before-12.9-improper-authorization-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121732?
- CVE-2026-121732 is a low-severity vulnerability in Francoisjacquet Rosariosis, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 2.7/10. Published 2026-11-03.
- How severe is CVE-2026-121732?
- Low severity. CVSS v3 base score is 2.7 out of 10.