CVE-2026-4557Public exploitNetwork attack vector

Script execution via unencoded sname output

Published Mar 22, 2026 · Updated Mar 22, 2026

Cross-site scripting in Code Projects Exam Form Submission 1.0 allows remote attackers to execute scripts through the sname parameter. The /admin/update_s1.php handler writes attacker-controlled sname input into an HTML response without filtering or context-appropriate output encoding. Exploitation requires a victim to load the affected output, where the injected script runs in the victim's browser and can act with the victim's session.

CVSS severity4.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Code Projects Exam Form Submission 1.0 allows remote attackers to execute scripts through the sname parameter. The /admin/update_s1.php handler writes attacker-controlled sname input into an HTML response without filtering or context-appropriate output encoding. Exploitation requires a victim to load the affected output, where the injected script runs in the victim's browser and can act with the victim's session.

The record

CVE
CVE-2026-4557
Published
Mar 22, 2026
Updated
Mar 22, 2026
Vendor
Tutorials Website
Product
Exam Form Submission
Classifications
CWE-94, CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 22, 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 privilegesunauthenticated

What is affected?

Tutorials Website · Exam Form Submissionversion=1.0

Published CVSS scores

4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
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

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
Privilegesunauthenticated
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')
T1189Drive-by Compromise

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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