CVE-2023-6440Public exploitNetwork attack vector

Stored script execution via unneutralized book metadata

Published Nov 30, 2023 · Updated Aug 2, 2024

Stored cross-site scripting in SourceCodester Book Borrower System 1.0 allows remote authenticated users to alter pages via crafted book metadata. The endpoint/add-book.php handler stores Book Title and Book Author values without neutralizing them before later page generation. An authenticated user can plant script content that executes when another user views the affected book listing, enabling actions or data access in that viewer's session.

CVSS severity5.4
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in SourceCodester Book Borrower System 1.0 allows remote authenticated users to alter pages via crafted book metadata. The endpoint/add-book.php handler stores Book Title and Book Author values without neutralizing them before later page generation. An authenticated user can plant script content that executes when another user views the affected book listing, enabling actions or data access in that viewer's session.

The record

CVE
CVE-2023-6440
Published
Nov 30, 2023
Updated
Aug 2, 2024
Vendor
SourceCodester
Product
Book Borrower System
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 30, 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?

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 privilegesauthenticated

What is affected?

SourceCodester · Book Borrower Systemversion=1.0

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/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')
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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