PT-2026-48668 · Os4Ed · Opensis Classic

Daniel Celis · Published 2026-06-11 · Updated 2026-06-11 · CVE-2026-8406

NVD

CVSS v4.0

7.1

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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

openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail id value.

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-8406

Affected Products

Opensis Classic

References · 4

• https://github.com/OS4ED/openSIS-Classic/commit/c45d43146167324bae06bdf09de3e4bd2e5e478f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-8406 · Security Note
• https://github.com/OS4ED/openSIS-Classic · Note
• https://fluidattacks.com/es/advisories/melanie · Note