CVE-2026-107864

6.5Medium

Published 12 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

6.5Medium

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required
Impact: Limited impact
Weakness: CWE-79

Impact

Authenticated attackers can execute arbitrary scripts in victim browsers to hijack sessions or alter pages. They require a low-privilege WordPress account and an admin or user to view the affected content.

Root cause

The plugin fails to sanitize and neutralize user-supplied input before rendering it on the page, resulting in stored cross-site scripting.

Affected systems

WordPress Ad Inserter plugin through 2.8.18

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Fix & remediation

Upgrade Ad Inserter to a version newer than 2.8.18 once released, or deactivate the plugin immediately if an update is not yet available.

shell

$ wp plugin update ad-inserter

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

Ad · In-content banner

NVD description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Igor Funa Ad Inserter ad-inserter allows Stored XSS.This issue affects Ad Inserter: from n/a through 2.8.18.

References

https://patchstack.com/database/wordpress/plugin/ad-inserter/vulnerability/wordpress-ad-inserter-plugin-2-8-18-cross-site-scripting-xss-vulnerability-2?_s_id=cve

Source: nvd.nist.gov/vuln/detail/CVE-2026-107864