CVE-2023-40024Public exploitNetwork attack vector

Browser script execution via unescaped license key

Published Aug 14, 2023 · Updated Oct 2, 2024

Reflected XSS in ScanCode.io before 32.5.2 allows remote attackers to run scripts in a visitor's browser through a crafted license URL. When a nonexistent license key is requested, license_details_view interpolates the unescaped key into an HTML 404 response. Exploitation requires a user to open the crafted URL; script execution in that user's origin can expose session data or perform actions as that user.

CVSS severity5.4
Medium
EPSS probability0.51%
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 ScanCode.io before 32.5.2 allows remote attackers to run scripts in a visitor's browser through a crafted license URL. When a nonexistent license key is requested, license_details_view interpolates the unescaped key into an HTML 404 response. Exploitation requires a user to open the crafted URL; script execution in that user's origin can expose session data or perform actions as that user.

The record

CVE
CVE-2023-40024
Published
Aug 14, 2023
Updated
Oct 2, 2024
Vendor
nexB
Product
ScanCode.io
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 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=0 <32.5.2
  2. Affected versionversion=< 32.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

nexB · ScanCode.ioversion=0 <32.5.2; version=< 32.5.2

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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