CVE-2023-32740Network attack vector

Browser script execution via reflected input

Published Aug 30, 2023 · Updated Apr 28, 2026

Reflected XSS in Kunal Nagar Custom 404 Pro 3.8.1 and earlier allows remote attackers to run browser script via crafted input. The public record ties the flaw to the 404 Logs feature but does not disclose the affected parameter or the output operation that fails to neutralize it. The attack is unauthenticated but requires a victim to open attacker-controlled content, after which the script runs in the victim's browser context.

CVSS severity5.8
Medium
EPSS probability0.34%
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 Kunal Nagar Custom 404 Pro 3.8.1 and earlier allows remote attackers to run browser script via crafted input. The public record ties the flaw to the 404 Logs feature but does not disclose the affected parameter or the output operation that fails to neutralize it. The attack is unauthenticated but requires a victim to open attacker-controlled content, after which the script runs in the victim's browser context.

The record

CVE
CVE-2023-32740
Published
Aug 30, 2023
Updated
Apr 28, 2026
Vendor
Kunal Nagar
Product
Custom 404 Pro
Classifications
CWE-79, CAPEC-591, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=n/a <=3.8.1 changes=[{"at":"3.8.2","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kunal Nagar · Custom 404 Proversion=n/a <=3.8.1 changes=[{"at":"3.8.2","status":"unaffected"}]

Published CVSS scores

5.8PatchstackCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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