CVE-2026-103115: OS4ED openSIS-Classic Student Search CustomFieldsFnc.php sql injection

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-30 · updated 2026-10-02
Weakness: CWE-74

Description

A security flaw has been discovered in OS4ED openSIS-Classic up to 9.3. This affects an unknown function of the file functions/CustomFieldsFnc.php of the component Student Search. The manipulation of the argument cust results in sql injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

OS4ED openSIS-Classic: 9.0, 9.1, 9.2, 9.3

References

https://github.com/OS4ED/openSIS-Classic/
https://github.com/OS4ED/openSIS-Classic/issues/475
https://vuldb.com/cve/CVE-2026-103115
https://vuldb.com/submit/954961
https://vuldb.com/vuln/411871
https://vuldb.com/vuln/411871/cti

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