CVE-2026-3403Public exploitNetwork attack vector

Stored script execution via unencoded subject field

Published Mar 2, 2026 · Updated Mar 2, 2026

Stored XSS in PHPGurukul Student Record System 1.0 allows remote authenticated users to execute JavaScript via a crafted Subject 1 value. The edit-subject.php handler stores the Subject 1 value without validation and renders it without output encoding. Administrator access is required to plant the payload, and a user must later view or edit the subject record, executing the script in that user's browser session.

CVSS severity4.8
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in PHPGurukul Student Record System 1.0 allows remote authenticated users to execute JavaScript via a crafted Subject 1 value. The edit-subject.php handler stores the Subject 1 value without validation and renders it without output encoding. Administrator access is required to plant the payload, and a user must later view or edit the subject record, executing the script in that user's browser session.

The record

CVE
CVE-2026-3403
Published
Mar 2, 2026
Updated
Mar 2, 2026
Vendor
jaychouchannel
Product
Student Record System
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 2, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

jaychouchannel · Student Record Systemversion=1.0

Published CVSS scores

2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
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
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/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-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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