CVE-2023-5835Network attack vector

Script injection via mismatched Markdown code-block parsing

Published Oct 28, 2023 · Updated Aug 2, 2024

Cross-site scripting in Hu60t hu60wap6 allows remote attackers to inject script through an indented Markdown code block. The markdown method in src/class/ubbparser.php treats content beginning with four spaces or a tab as code even when Parsedown rejects it for lacking a preceding blank line, leaving embedded HTML unescaped. Execution requires a user to view the rendered content; the script then runs within the page's browser origin.

CVSS severity6.1
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Hu60t hu60wap6 allows remote attackers to inject script through an indented Markdown code block. The markdown method in src/class/ubbparser.php treats content beginning with four spaces or a tab as code even when Parsedown rejects it for lacking a preceding blank line, leaving embedded HTML unescaped. Execution requires a user to view the rendered content; the script then runs within the page's browser origin.

The record

CVE
CVE-2023-5835
Published
Oct 28, 2023
Updated
Aug 2, 2024
Vendor
Hu60t
Product
hu60wap6
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Hu60t · hu60wap6version=n/a

Published CVSS scores

4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
6.1NVDCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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