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WP Tab Widget CVE-2026-66646

| EUVDEUVD-2026-60930 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-08-18 Patchstack GHSA-2cw9-f6hc-22wm
WordPress XSS Wordpress Plugin Wp Tab Widget Mythemeshop
6.5
CVSS 3.1 · Vendor: Patchstack
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Severity by source

Vendor (Patchstack) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
vuln.today AI
5.4 MEDIUM

Contributor auth required (PR:L), victim page-view required (UI:R), scope change to admin session confirmed (S:C); availability impact (A:N) not substantiated for standard stored XSS without a DoS mechanism.

3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

1
Analysis Generated
Aug 18, 2026 - 15:40 vuln.today

DescriptionCVE.org

Contributor Cross Site Scripting (XSS) in WP Tab Widget <= 1.2.11 versions.

AnalysisAI

Stored Cross-Site Scripting in WP Tab Widget (WordPress plugin by MyThemeShop) allows authenticated contributors to inject persistent malicious scripts into tab widget content that execute in the browsers of other site users, including administrators. All versions up to and including 1.2.11 are confirmed affected per Patchstack and ENISA EUVD-2026-60930. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to hold at least contributor-level authenticated access to the target WordPress site, confirmed by the CVSS PR:L metric - unauthenticated users cannot exploit this vulnerability. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 Medium rating (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) accurately reflects the core attack constraints: network-accessible but requiring contributor-level authentication and a victim's page view. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary remediation is to update WP Tab Widget to a version released after 1.2.11; consult the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/wp-tab-widget/vulnerability/wordpress-wp-tab-widget-plugin-1-2-11-cross-site-scripting-xss-vulnerability and the plugin's WordPress.org page for the confirmed patched release version, which is not independently specified in the available intelligence. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-66646 vulnerability details – vuln.today
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