CVE-2023-6463Public exploitNetwork attack vector

Stored XSS via unfiltered first_name

Published Dec 1, 2023 · Updated Aug 2, 2024

Cross-site scripting in SourceCodester User Registration and Login System 1.0 allows remote authenticated users to execute script via add-user.php. The endpoint stores an unfiltered first_name value, and home.php later renders that value without output encoding, causing stored script execution when the page is viewed. Exploitation requires a valid account and a victim visiting home.php; the demonstrated impact is browser-side script execution with confidentiality and integrity effects in that session.

CVSS severity5.4
Medium
EPSS probability0.60%
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 SourceCodester User Registration and Login System 1.0 allows remote authenticated users to execute script via add-user.php. The endpoint stores an unfiltered first_name value, and home.php later renders that value without output encoding, causing stored script execution when the page is viewed. Exploitation requires a valid account and a victim visiting home.php; the demonstrated impact is browser-side script execution with confidentiality and integrity effects in that session.

The record

CVE
CVE-2023-6463
Published
Dec 1, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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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')
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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