CVE-2026-5668Public exploitNetwork attack vector

Administrator script execution via unencoded form action

Published Apr 6, 2026 · Updated Apr 6, 2026

Reflected XSS in Cyber-III Student Management System allows remote authenticated users to execute script through a crafted add-notice URL. The add notice.php page places unencoded $_SERVER['PHP_SELF'] data into two form action attributes, turning path data into executable markup. An administrator must be logged in and open the malicious URL; injected script then runs in that administrator's browser context.

CVSS severity2.4
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Cyber-III Student Management System allows remote authenticated users to execute script through a crafted add-notice URL. The add notice.php page places unencoded $_SERVER['PHP_SELF'] data into two form action attributes, turning path data into executable markup. An administrator must be logged in and open the malicious URL; injected script then runs in that administrator's browser context.

The record

CVE
CVE-2026-5668
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Cyber-III
Product
Student Management System
Classifications
CWE-79, CWE-94, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1a938fa61e9f735078e9b291d2e6215b4942af3f

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cyber-III · Student Management Systemversion=1a938fa61e9f735078e9b291d2e6215b4942af3f

Published CVSS scores

1.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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