CVE-2026-6622Public exploitNetwork attack vector

Stored cross-site scripting via unescaped customer fields

Published Apr 20, 2026 · Updated Apr 20, 2026

Stored cross-site scripting in BichitroGan ISP Billing Software 2025.3.20 allows remote authenticated users to execute JavaScript in viewers' browsers. The customer edit handler stores the fullname and address parameters without sanitization and renders them in customer list and edit pages without HTML output encoding. A privileged authenticated user must save a crafted field and another user must view an affected page, where the script executes with that viewer's session privileges.

CVSS severity2.4
Low
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 cross-site scripting in BichitroGan ISP Billing Software 2025.3.20 allows remote authenticated users to execute JavaScript in viewers' browsers. The customer edit handler stores the fullname and address parameters without sanitization and renders them in customer list and edit pages without HTML output encoding. A privileged authenticated user must save a crafted field and another user must view an affected page, where the script executes with that viewer's session privileges.

The record

CVE
CVE-2026-6622
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
BichitroGan
Product
ISP Billing Software
Classifications
CWE-79, CWE-94, T1203
Attack vector
network
Privileges
admin

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 privilegesadmin

What is affected?

BichitroGan · ISP Billing Softwareversion=2025.3.20

Published CVSS scores

2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
1.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/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
Privilegesadmin
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')
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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