CVE-2026-5643Public exploitNetwork attack vector

Admin-context 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 notice URL. In admin/Add notice/notice.php, the form action prints $_SERVER['PHP_SELF'] into HTML without encoding, so path data closes the attribute and injects script. The page requires an administrator session and browser interaction; injected code runs in that administrator's web 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 notice URL. In admin/Add notice/notice.php, the form action prints $_SERVER['PHP_SELF'] into HTML without encoding, so path data closes the attribute and injects script. The page requires an administrator session and browser interaction; injected code runs in that administrator's web context.

The record

CVE
CVE-2026-5643
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Cyber-III
Product
Student Management System
Classifications
CWE-94, CWE-79, T1203
Attack vector
network
Privileges
admin

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 privilegesadmin

What is affected?

Cyber-III · Student Management Systemversion=1a938fa61e9f735078e9b291d2e6215b4942af3f

Published CVSS scores

3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
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
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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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