EUVD-2026-67409
GHSA-c5pr-2r2f-2j58
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Stored XSS requires a victim to load the injected page (UI:R); all other metrics align with the provided vector; no availability impact applies.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'size' Shortcode Attribute in all versions up to, and including, 3.15.6 due to insufficient input sanitization and output escaping. 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. WordPress's wp_kses_post filter does not neutralize the payload because the injected content resides entirely within a shortcode attribute string containing no HTML angle brackets, causing kses to pass it through unchanged at save time.
AnalysisAI
Stored Cross-Site Scripting in the Avada (Fusion) Builder WordPress plugin through version 3.15.6 allows authenticated contributors to permanently embed malicious JavaScript in page content via the 'size' shortcode attribute. The root bypass is structural: WordPress's wp_kses_post filter only inspects HTML angle-bracket constructs, so payloads confined entirely to a shortcode attribute string pass the filter unchanged at save time and execute in any visitor's browser. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a valid WordPress account with at minimum contributor-level role on the target site. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.4 score reflects a meaningful but not critical risk profile: network-accessible (AV:N), low complexity (AC:L), low-privilege entry point (PR:L requiring only contributor access), and Scope:Changed (S:C) with low confidentiality and integrity impact. … 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 the Avada (Fusion) Builder plugin to a version above 3.15.6; the exact fixed version was not confirmed in the available references and should be verified against the Avada changelog at https://avada.com/documentation/avada-changelog/ before deploying. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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