CVE-2026-31050Public exploitNetwork attack vector

Confidentiality loss via stored interface script injection

Published Apr 24, 2026 · Updated Apr 24, 2026

Stored cross-site scripting in HostBill 2025-11-24 and 2025-12-01 allows remote authenticated users to execute scripts in web sessions. HostBill stores attacker-supplied markup and renders it in its admin and client interfaces without safe output encoding; the public proof of concept does not identify the affected field. Exploitation requires high privileges, and the published assessment limits demonstrated impact to reading sensitive data through the affected web context.

CVSS severity4.9
Medium
EPSS probability0.63%
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 HostBill 2025-11-24 and 2025-12-01 allows remote authenticated users to execute scripts in web sessions. HostBill stores attacker-supplied markup and renders it in its admin and client interfaces without safe output encoding; the public proof of concept does not identify the affected field. Exploitation requires high privileges, and the published assessment limits demonstrated impact to reading sensitive data through the affected web context.

The record

CVE
CVE-2026-31050
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.9CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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