CVE-2023-41657Network attack vector

Stored XSS via unescaped form placeholder attributes

Published Sep 29, 2023 · Updated Apr 28, 2026

Stored XSS in Groundhogg Inc. HollerBox 2.3.2 and earlier allows remote authenticated users to execute scripts via form placeholders. Form input placeholder attributes render stored administrator-controlled values without attribute escaping, allowing injected markup to execute in a visitor’s browser. Administrator access is required to store the payload, and exploitation then requires another user to view the affected form.

CVSS severity5.9
Medium
EPSS probability0.36%
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 Groundhogg Inc. HollerBox 2.3.2 and earlier allows remote authenticated users to execute scripts via form placeholders. Form input placeholder attributes render stored administrator-controlled values without attribute escaping, allowing injected markup to execute in a visitor’s browser. Administrator access is required to store the payload, and exploitation then requires another user to view the affected form.

The record

CVE
CVE-2023-41657
Published
Sep 29, 2023
Updated
Apr 28, 2026
Vendor
Groundhogg Inc.
Product
HollerBox
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=n/a <=2.3.2 changes=[{"at":"2.3.3","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Groundhogg Inc. · HollerBoxversion=n/a <=2.3.2 changes=[{"at":"2.3.3","status":"unaffected"}]

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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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