CVE-2026-13701

Deferred Deferred - Pending Action

Stored XSS in Advanced Excerpt WordPress Plugin

Publication date: 2026-08-10

Last updated on: 2026-08-26

Assigner: WPScan

Description

The Advanced Excerpt WordPress plugin before 4.5 does not sanitise and escape one of its settings before outputting it on the front end of the site, which could allow administrators (including those without the unfiltered_html capability, such as on multisite) to perform Stored Cross-Site Scripting attacks that execute in the context of any visitor viewing affected pages.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-10

Last Modified

2026-08-26

Generated

2026-08-30

AI Q&A

2026-08-10

EPSS Evaluated

2026-08-29

NVD

CVE-2026-13701

EUVD

EUVD-2026-55021

Affected Vendors & Products

Vendor	Product	Version / Range
advanced_excerpt	advanced_excerpt	to 4.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This is a stored Cross-Site Scripting (XSS) vulnerability in the Advanced Excerpt WordPress plugin before version 4.5. The plugin fails to sanitize and escape one of its settings before displaying it on the front end, allowing administrators to inject malicious scripts that execute when visitors view affected pages.

Detection Guidance

To detect this vulnerability, check the installed version of the Advanced Excerpt WordPress plugin. If the version is below 4.5, the system is vulnerable. You can verify the version by inspecting the plugin files or using WordPress admin panel under Plugins.

Impact Analysis

This vulnerability allows attackers with admin access to inject malicious scripts into web pages. When visitors view these pages, the scripts execute, potentially stealing cookies, session tokens, or other sensitive data. It can also be used to deface websites or redirect users to malicious sites.

Compliance Impact

This vulnerability could lead to data breaches, which may violate GDPR and HIPAA requirements for protecting user data. Organizations could face fines or penalties if they fail to address this issue and a breach occurs.

Mitigation Strategies

Immediately update the Advanced Excerpt plugin to version 4.5 or later. This patch addresses the improper sanitization and escaping flaw. Ensure backups are taken before updating. Monitor for any suspicious activity post-update.

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