CVE-2023-0840Public exploitNetwork attack vector

Stored script execution via unneutralized username

Published Feb 15, 2023 · Updated Mar 18, 2025

Stored cross-site scripting in PHPCrazy 1.1.1 allows remote authenticated users to execute script in another user's browser. The admin/admin.php user-information view places the stored username value into generated HTML without neutralizing script content. An authenticated attacker must save a crafted username and a victim must view the affected administrative page, enabling unauthorized browser-context actions.

CVSS severity5.4
Medium
EPSS probability0.62%
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 PHPCrazy 1.1.1 allows remote authenticated users to execute script in another user's browser. The admin/admin.php user-information view places the stored username value into generated HTML without neutralizing script content. An authenticated attacker must save a crafted username and a victim must view the affected administrative page, enabling unauthorized browser-context actions.

The record

CVE
CVE-2023-0840
Published
Feb 15, 2023
Updated
Mar 18, 2025
Vendor
PHPCrazy Project
Product
PHPCrazy
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2025Record 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=1.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PHPCrazy Project · PHPCrazyversion=1.1.1

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDB CNAAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDB CNACVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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