CVE-2026-8406

UNKNOWN 0.0

openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-639
Vendor	os4ed
Product	opensis-classic
Published	Jun 11, 2026
Last Updated	Jun 11, 2026

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Affected Versions

OS4ED / openSIS-Classic

9.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

fluidattacks.com: https://fluidattacks.com/es/advisories/melanie github.com: https://github.com/OS4ED/openSIS-Classic/commit/c45d43146167324bae06bdf09de3e4bd2e5e478f github.com: https://github.com/OS4ED/openSIS-Classic

Credits

Daniel Celis