CVE-2024-23855Network attack vector

Session cookie theft via unencoded tax parameters

Published Jan 25, 2024 · Updated May 29, 2025

Reflected XSS in Cups Easy (Purchase & Inventory) 1.0 allows remote attackers to steal an authenticated user's session cookie. The taxcodemodify.php endpoint returns multiple user-controlled parameters without sufficient output encoding when processing a crafted URL. The attack succeeds only when an authenticated user opens that URL, causing attacker-supplied script to execute in the user's browser context.

CVSS severity8.2
High
EPSS probability0.40%
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 Cups Easy (Purchase & Inventory) 1.0 allows remote attackers to steal an authenticated user's session cookie. The taxcodemodify.php endpoint returns multiple user-controlled parameters without sufficient output encoding when processing a crafted URL. The attack succeeds only when an authenticated user opens that URL, causing attacker-supplied script to execute in the user's browser context.

The record

CVE
CVE-2024-23855
Published
Jan 25, 2024
Updated
May 29, 2025
Vendor
Cups Easy
Product
Cups Easy (Purchase & Inventory)
Classifications
CWE-79, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2024CVE publishedPublication date reported by the CVE source.
  2. May 29, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cups Easy · Cups Easy (Purchase & Inventory)version=1.0

Published CVSS scores

6.1National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
8.2Spanish National Cybersecurity Institute, S.A. (INCIBE)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/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')
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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