CVE-2024-9440Public exploitNetwork attack vector

JavaScript execution via unsanitized option text

Published Oct 2, 2024 · Updated Jul 14, 2026

Cross-site scripting in Brian Voelker Slim Select 2.0.0 through 2.9.1 allows remote attackers to execute JavaScript via option text. The createOption method assigns the user-controlled Options.text value to an option element's innerHTML property without neutralizing markup. Exploitation requires a consuming application to pass unsanitized attacker-controlled option text and a user to render the resulting list, enabling script execution in that application's browser origin.

CVSS severity5.4
Medium
EPSS probability0.36%
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 Brian Voelker Slim Select 2.0.0 through 2.9.1 allows remote attackers to execute JavaScript via option text. The createOption method assigns the user-controlled Options.text value to an option element's innerHTML property without neutralizing markup. Exploitation requires a consuming application to pass unsanitized attacker-controlled option text and a user to render the resulting list, enabling script execution in that application's browser origin.

The record

CVE
CVE-2024-9440
Published
Oct 2, 2024
Updated
Jul 14, 2026
Vendor
Brian Voelker
Product
Slim Select
Classifications
CWE-79, CAPEC-243, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 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=2.0 <=2.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Brian Voelker · Slim Selectversion=2.0 <=2.9.0

Published CVSS scores

5.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.4VulnCheckCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
CAPEC-243XSS Targeting HTML Attributes
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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