CVE-2026-6623Public exploitNetwork attack vector

Stored XSS via unencoded profile fullname

Published Apr 20, 2026 · Updated Apr 20, 2026

Stored XSS in BichitroGan ISP Billing Software 2025.3.20 allows remote authenticated users to execute JavaScript via a profile name. The profile update handler stores the fullname field, and the users-view page renders that value without output encoding. An authenticated account can plant the payload, but another user must view the affected profile; execution remains confined to that viewer's browser context.

CVSS severity4.8
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in BichitroGan ISP Billing Software 2025.3.20 allows remote authenticated users to execute JavaScript via a profile name. The profile update handler stores the fullname field, and the users-view page renders that value without output encoding. An authenticated account can plant the payload, but another user must view the affected profile; execution remains confined to that viewer's browser context.

The record

CVE
CVE-2026-6623
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
BichitroGan
Product
ISP Billing Software
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 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=2025.3.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

BichitroGan · ISP Billing Softwareversion=2025.3.20

Published CVSS scores

3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
4.8VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007JavaScript/JScript

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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