EUVD-2026-42219
GHSA-5fx8-gw78-r8q8
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.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
The Advanced iFrame plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'additional' parameter in all versions up to, and including, 2026.1 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.
AnalysisAI
Stored Cross-Site Scripting in the Advanced iFrame WordPress plugin (versions through 2026.1) allows authenticated contributors to permanently inject malicious scripts into WordPress pages via the unsanitized 'additional' parameter. Any site visitor loading an affected page will execute the attacker's payload in their browser, enabling session hijacking, credential theft, or defacement. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session with at minimum WordPress contributor-level privileges, which grants the ability to create and edit posts or pages using the Advanced iFrame plugin. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS vector (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N, 6.4) uses UI:N, which is atypical for stored XSS - traditional scoring applies UI:R since a victim must load the injected page. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained or registered a contributor-level account on a WordPress site edits a page or post and injects a malicious JavaScript payload into the Advanced iFrame block's 'additional' parameter field. The script is saved to the database and rendered unescaped in the page HTML; any authenticated user - including administrators - who subsequently loads the page triggers the payload, which could steal session cookies or perform actions on behalf of the victim within the WordPress admin context. |
| Remediation | Update the Advanced iFrame plugin to the version corresponding to changeset 3558422 or later via the WordPress admin dashboard (Plugins → Updates) or WP-CLI (`wp plugin update advanced-iframe`). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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