Injection Guard <= 1.2.9 - Unauthenticated Stored Cross-Site Scripting via Query Parameter Name

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Summary

CVECVE-2026-3368
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-21 00:16:28 UTC
Updated2026-04-22 21:32:08 UTC
DescriptionThe Injection Guard plugin for WordPress is vulnerable to Stored Cross-Site Scripting via malicious query parameter names in all versions up to and including 1.2.9. This is due to insufficient input sanitization in the sanitize_ig_data() function which only sanitizes array values but not array keys, combined with missing output escaping in the ig_settings.php template where stored parameter keys are echoed directly into HTML. When a request is made to the site, the plugin captures the query string via $_SERVER['QUERY_STRING'], applies esc_url_raw() (which preserves URL-encoded special characters like %22, %3E, %3C), then passes it to parse_str() which URL-decodes the string, resulting in decoded HTML/JavaScript in the array keys. These keys are stored via update_option('ig_requests_log') and later rendered without esc_html() or esc_attr() on the admin log page. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in the admin log page that execute whenever an administrator views the Injection Guard log interface.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

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

EPSS: 0.002480000 probability, percentile 0.481310000 (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]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fahadmahmood Injection Guard affected 1.2.9 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/injection-guard/trunk/ig_settings.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/trunk/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/ig_settings.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/trunk/guard.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/15d9817c-910d-4ce1-a5fb-67a2b... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/trunk/ig_settings.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/trunk/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/trunk/ig_settings.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/ig_settings.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/trunk/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/trunk/guard.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/injection-guard/tags/1.2.8/ig_settings.php [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: Itthidej Aramsri (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-20T10:55:45.000ZDisclosed

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