CVE-2026-5671Public exploitNetwork attack vector

Unauthenticated reflected XSS via unescaped batch value

Published Apr 6, 2026 · Updated Apr 6, 2026

Reflected XSS in Cyber-III Student Management System's class schedule deletion endpoint allows remote attackers to execute script in a victim browser. The delete_batch.php endpoint concatenates the POST batch value directly into an HTML response without output encoding or an administrator permission check. No login is required at affected commit 1a938fa61e9f735078e9b291d2e6215b4942af3f; execution occurs when a browser renders the crafted response and can alter page content in that browser.

CVSS severity4.3
Medium
EPSS probability0.28%
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's class schedule deletion endpoint allows remote attackers to execute script in a victim browser. The delete_batch.php endpoint concatenates the POST batch value directly into an HTML response without output encoding or an administrator permission check. No login is required at affected commit 1a938fa61e9f735078e9b291d2e6215b4942af3f; execution occurs when a browser renders the crafted response and can alter page content in that browser.

The record

CVE
CVE-2026-5671
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Cyber-III
Product
Student Management System
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Cyber-III · Student Management Systemversion=1a938fa61e9f735078e9b291d2e6215b4942af3f

Published CVSS scores

5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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')
T1059.007JavaScript/JScript

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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