CVE-2026-9280 Ad Inserter <= 2.8.15 - Reflected Cross-Site Scripting via URL Parameters in iframe Mode
Unauthenticated attackers can inject arbitrary scripts via URL parameters in iframe mode, requiring user interaction and specific configuration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-9280?
CVE-2026-9280 is a medium-severity cross-site scripting vulnerability in spacetime Ad Inserter – Ad Manager & AdSense Ads, published on 6 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via URL Parameters in iframe Mode in all versions up to, and including, 2.8.15 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires that iframe mode (AI_OPTION_IFRAME) is enabled on at least one ad block displayed on the targeted page, which is a non-default but supported configuration commonly used for AdSense and JavaScript-based ads.
Weakness: CWE-79
Which versions are affected by CVE-2026-9280?
How do I fix CVE-2026-9280?
No fix has been published for CVE-2026-9280 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-9280 being exploited?
There is no known exploitation of CVE-2026-9280 in the wild and no public exploit code.
Sources
Also known as GHSA-m3rj-j76j-78jj.