Scoreboard for HTML5 Games Lite <= 1.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

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Summary

CVECVE-2026-4083
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-21 00:16:29 UTC
Updated2026-04-22 21:32:08 UTC
DescriptionThe Scoreboard for HTML5 Games Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'scoreboard' shortcode in all versions up to, and including, 1.2. The shortcode function sfhg_shortcode() allows arbitrary HTML attributes to be added to the rendered <iframe> element, with only a small blacklist of four attribute names (same_height_as, onload, onpageshow, onclick) being blocked. While the attribute names are passed through esc_html() and values through esc_attr(), this does not prevent injection of JavaScript event handler attributes like onfocus, onmouseover, onmouseenter, etc., because these attribute names and simple JavaScript payloads contain no characters that would be modified by these escaping functions. The shortcode text is stored in post_content and is only expanded to HTML at render time, after WordPress's kses filtering has already been applied to the raw post content. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.000540000 probability, percentile 0.169390000 (date 2026-04-22)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Demonisblack Scoreboard For HTML5 Games Lite affected 1.2 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/scoreboard-for-html5-game-lite/trunk/scoreboard-for-h... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/scoreboard-for-html5-game-lite/tags/1.2/scoreboard-fo... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/scoreboard-for-html5-game-lite/tags/1.2/scoreboard-fo... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/scoreboard-for-html5-game-lite/trunk/scoreboard-for-h... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/scoreboard-for-html5-game-lite/tags/1.2/scoreboard-fo... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/550ae348-254e-49f5-8046-38629... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/scoreboard-for-html5-game-lite/trunk/scoreboard-for-h... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Muhammad Yudha - DJ (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-20T11:20:53.000ZDisclosed
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