CVE-2023-0357Public exploitNetwork attack vector

Browser script execution via HTML ticket attachments

Published Apr 4, 2023 · Updated Feb 13, 2025

Stored XSS in Helpy 2.8.0 allows remote attackers to run script in a user's browser through a crafted customer ticket attachment. The attachment filter accepts an uploaded HTML document and serves its embedded script without neutralizing active content when the attachment is opened. No account is required to submit the ticket, but a user must open the stored attachment; script execution can read or alter data available to that browser session.

CVSS severity6.1
Medium
EPSS probability0.69%
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 Helpy 2.8.0 allows remote attackers to run script in a user's browser through a crafted customer ticket attachment. The attachment filter accepts an uploaded HTML document and serves its embedded script without neutralizing active content when the attachment is opened. No account is required to submit the ticket, but a user must open the stored attachment; script execution can read or alter data available to that browser session.

The record

CVE
CVE-2023-0357
Published
Apr 4, 2023
Updated
Feb 13, 2025
Vendor
Helpy
Product
Helpy
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=2.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Helpy · Helpyversion=2.8.0

Published CVSS scores

7.1Fluid AttacksCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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 exploitPublished

Weakness, pattern, technique

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