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VulnerabilityPublished Updated

CVE-2026-103115: OS4ED openSIS-Classic · SQL Injection

Affects OS4ED openSIS-ClassicSource CVE Database V5

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Public exploit available · CVSS 5.3 Medium.

Data as of 14 Nov 2026, 20:43 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
OS4EDopenSIS-ClassicAffected
  • 9.0 – 9.3
4 affected builds
Fixed in–
GitHubos4ed/openSIS-Classicpkg:github/os4ed/openSIS-ClassicOther threatsAffected
  • 9.0 – 9.3
4 affected builds
Fixed in–

CPE configurations (1)

  • cpe:2.3:a:os4ed:opensis-classic:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should monitor the vendor's communications for updates. Until a patch is released, consider restricting access to the affected component or applying web application firewall rules to detect and block SQL injection attempts targeting the 'cust' parameter.

Description

CVE-2026-103115 is a medium severity SQL injection vulnerability in OS4ED openSIS-Classic versions 9.0 through 9.3. The flaw exists in the Student Search component, specifically in the functions/CustomFieldsFnc.php file, where manipulation of the 'cust' argument allows remote attackers to perform SQL injection. The vulnerability has a public exploit available, but the vendor has not yet responded or issued a patch.

References

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