CVE-2026-8625
Received Received - Intake

Stored XSS in Dear Flipbook WordPress Plugin

Publication date: 2026-09-05

Last updated on: 2026-09-05

Assigner: Wordfence

Description
The Dear Flipbook – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_content (Custom HTML block inner HTML)' parameter in all versions up to, and including, 2.4.30 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. A Contributor-level attacker can insert a crafted .df-element div with data-df-lightbox='thumb' via a Custom HTML block, whose inner HTML is passed as the title argument to parseThumbs() at render time, enabling both innerHTML injection into a span element and attribute breakout via an onerror handler on a constructed img element.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-05
Last Modified
2026-09-05
Generated
2026-09-05
AI Q&A
2026-09-05
EPSS Evaluated
N/A
NVD
CVE-2026-8625
EUVD
EUVD-2026-71841

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
dear_flipbook pdf_flipbook to 2.4.30 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Dear Flipbook WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts into web pages via the 'post_content' parameter. The issue arises from insufficient input sanitization and output escaping, enabling script execution when users view the infected pages.

Detection Guidance

Check WordPress sites using the Dear Flipbook plugin for unauthorized Custom HTML blocks containing suspicious scripts or .df-element divs with data-df-lightbox attributes. Inspect page source for injected onerror handlers or span elements with unexpected content.

Impact Analysis

An attacker could steal user sessions, redirect users to malicious sites, or perform actions on their behalf. Since the plugin is widely used, compromised sites could spread malware or phishing attacks. Users with contributor access can exploit this to escalate privileges or deface websites.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR (data protection) and HIPAA (health data privacy). Stored XSS may expose user data, triggering compliance violations, fines, or legal action due to unauthorized access or data leaks.

Mitigation Strategies

Update the Dear Flipbook plugin to the latest version beyond 2.4.30. Remove any untrusted Custom HTML blocks. Restrict contributor-level access to only trusted users. Monitor pages for unusual scripts or redirects.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-8625. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart