# CVE-2026-11983: Ad Inserter <= 2.8.16 - Missing Authorization to Block Visibility Bypass via ai_ajax

> Unauthenticated attackers can bypass visibility restrictions to view administrator-only ad block contents in the Ad Inserter WordPress plugin.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 6 Aug 2026
- **Also known as:** GHSA-74q3-73gr-qrvx

## What is CVE-2026-11983?

CVE-2026-11983 is a medium-severity missing authorization vulnerability in spacetime Ad Inserter – Ad Manager & AdSense Ads, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.8.16 due to a missing capability check in the `ai_ajax` function. This makes it possible for unauthenticated attackers to view the contents of ad blocks that an administrator has restricted to administrator-only visibility.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-11983?


## How do I fix CVE-2026-11983?

No fix has been published for CVE-2026-11983 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11983 being exploited?

There is no known exploitation of CVE-2026-11983 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11983 and fix it if it is affected.

What it is: CVE-2026-11983 is a medium-severity missing authorization vulnerability in spacetime Ad Inserter – Ad Manager & AdSense Ads, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-11983 in the wild and no public exploit code.

Affected product: spacetime Ad Inserter – Ad Manager & AdSense Ads. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-11983/ (Markdown: https://insights.sbomify.com/CVE-2026-11983/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11983
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11983
- OSV: https://osv.dev/vulnerability/CVE-2026-11983

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-11983/
Summaries are generated and may contain mistakes; the official description above is the record.