AMP for WP <= 1.1.16 - Unauthenticated Stored Cross-Site Scripting via Comment Content Regex Transformation
Summary
| CVE | CVE-2026-83591 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-25 07:16:54 UTC |
| Updated | 2026-09-25 14:17:19 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.2 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
EPSS: 0.002470000 probability, percentile 0.143170000 (date 2026-09-27)
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Mohammed Kaludi | AMP For WP Accelerated Mobile Pages | affected 1.1.16 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.15/templates/featur... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/47ef0e19-8b67-42ad-b8e9-72b0d... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.15/includes/feature... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.14/components/comme... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.14/includes/feature... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.14/templates/featur... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.15/components/comme... | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Pham Duc Anh (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-09-24T18:04:31.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.