CVE-2026-83591
AMP for WP <= 1.1.16 - Unauthenticated Stored Cross-Site Scripting via Comment Content Regex Transformation
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.
INFO
Published Date :
Sept. 25, 2026, 7:16 a.m.
Last Modified :
Sept. 25, 2026, 7:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the AMP for WP plugin to the latest version.
- Review and sanitize all user-generated comment content.
- Ensure proper output escaping for all displayed data.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-83591.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-83591 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-83591
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-83591 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-83591 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Sep. 25, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/83xxx/CVE-2026-83591.json">CVE-2026-83591</a> Added Reference https://plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.14/components/comments/comments.php#L89 Added Reference https://plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.14/includes/features/functions.php#L314 Added Reference https://plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.14/templates/features.php#L8823 Added Reference https://plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.15/components/comments/comments.php#L89 Added Reference https://plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.15/includes/features/functions.php#L314 Added Reference https://plugins.trac.wordpress.org/browser/accelerated-mobile-pages/tags/1.1.15/templates/features.php#L8823 Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&old=3689899%40accelerated-mobile-pages&new=3689899%40accelerated-mobile-pages Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/47ef0e19-8b67-42ad-b8e9-72b0dbe5e3a5?source=cve