# CVE-2026-83591: AMP for WP <= 1.1.16 - Unauthenticated Stored Cross-Site Scripting via Comment Content Regex Transformation

> Unauthenticated attackers can inject arbitrary web scripts via comment content due to insufficient sanitization in the AMP for WP plugin.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/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:** 25 Sep 2026
- **Updated:** 25 Sep 2026
- **Also known as:** GHSA-wprj-f7qx-9mm8

## What is CVE-2026-83591?

CVE-2026-83591 is a high-severity cross-site scripting vulnerability in mohammed_kaludi AMP for WP – Accelerated Mobile Pages, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Regex Transformation in all versions up to, and including, 1.1.16 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The crafted payload uses only WordPress-permitted comment tags and attributes (an anchor with href and title), and the AMP sanitizer pipeline omits javascript: protocol blocking, meaning neither the comment save filter nor the AMP output stage removes the malicious URI introduced by the transformation.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-83591?


## How do I fix CVE-2026-83591?

No fix has been published for CVE-2026-83591 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-83591 being exploited?

There is no known exploitation of CVE-2026-83591 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-83591 and fix it if it is affected.

What it is: CVE-2026-83591 is a high-severity cross-site scripting vulnerability in mohammed_kaludi AMP for WP – Accelerated Mobile Pages, published on 25 Sep 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-2026-83591 in the wild and no public exploit code.

Affected product: mohammed_kaludi AMP for WP – Accelerated Mobile Pages. 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-2026-83591/ (Markdown: https://insights.sbomify.com/CVE-2026-83591/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-83591
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-83591
- OSV: https://osv.dev/vulnerability/CVE-2026-83591

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-83591/
Summaries are generated and may contain mistakes; the official description above is the record.