---
id: CVE-2026-8625
title: >-
  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, …
summary: >-
  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, …
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-09-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T13:12:58.310'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-8625'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/3d-flipbook-dflip-lite/tags/2.4.27/assets/js/dflip.js#L2712
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/3d-flipbook-dflip-lite/tags/2.4.27/assets/js/dflip.js#L2718
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/3d-flipbook-dflip-lite/tags/2.4.27/assets/js/dflip.js#L2791
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/3d-flipbook-dflip-lite/tags/2.4.27/assets/js/dflip.js#L2796
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3641463/3d-flipbook-dflip-lite/trunk/assets/js/dflip.js
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?old_path=%2F3d-flipbook-dflip-lite/tags/2.4.30&new_path=%2F3d-flipbook-dflip-lite/tags/2.4.37
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&new=3641463%403d-flipbook-dflip-lite%2Ftags%2F2.4.37&old=3557511%403d-flipbook-dflip-lite%2Ftags%2F2.4.30
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/741150a3-1b2a-4b54-9dd5-992d3d7079dc?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00206
epssPercentile: 0.10936
ingestedAt: '2026-09-06T02:48:40.832Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.