CVE-2026-4083Network attack vector

Contributor-level stored XSS via shortcode event attributes

Published Mar 20, 2026 · Updated Mar 20, 2026

Stored XSS in demonisblack Scoreboard for HTML5 Games Lite 1.2 and earlier allows remote authenticated users to run scripts via shortcode attributes. The sfhg_shortcode() function copies untrusted attribute names into an iframe after blocking only four names, allowing other event handlers to survive escaping. Contributor-level post access is sufficient; stored shortcode text expands after kses filtering and runs in browsers that load the injected page.

CVSS severity6.4
Medium
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 XSS in demonisblack Scoreboard for HTML5 Games Lite 1.2 and earlier allows remote authenticated users to run scripts via shortcode attributes. The sfhg_shortcode() function copies untrusted attribute names into an iframe after blocking only four names, allowing other event handlers to survive escaping. Contributor-level post access is sufficient; stored shortcode text expands after kses filtering and runs in browsers that load the injected page.

The record

CVE
CVE-2026-4083
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
Demonisblack
Product
Scoreboard for HTML5 Games Lite
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 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=* <=1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Demonisblack · Scoreboard for HTML5 Games Liteversion=* <=1.2

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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