CVE-2026-8406

openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail

Published Jun 11, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail
First Time appeared Os4ed
Os4ed opensis-classic
Weaknesses CWE-639
CPEs cpe:2.3:a:os4ed:opensis-classic:9.3:*:linux:*:*:*:*:*
cpe:2.3:a:os4ed:opensis-classic:9.3:*:macos:*:*:*:*:*
cpe:2.3:a:os4ed:opensis-classic:9.3:*:windows:*:*:*:*:*
Vendors & Products Os4ed
Os4ed opensis-classic
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Fluid Attacks
Published
Updated
Jun 11, 2026, 2:28 PM
Reserved
May 12, 2026, 3:47 PM
Status
Deferred
Published
Jun 11, 2026, 2:16 PM
Modified
Oct 26, 2026, 11:10 AM