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CVE-2026-8625— Dear Flipbook <= 2.4.30 - Authenticated (Contributor+) Stored Cross-Site Scripting via '.df-element' Element Inner HTML

Quick assessment

Affected
dearhive DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Dear Flipbook – PDF Flipbook、3D 翻页书、PDF 嵌入、WordPress PDF 阅读器插件在所有版本中（包括 2.4.30 及更早版本）存在存储型跨站脚本（Stored XSS）漏洞。该漏洞源于输入消毒不足和输出转义不充分，具体出现在 参数（自定义 HTML 代码块内部 HTML）中。 这使得拥有贡献者（contributor）及以上权限的已认证攻击者能够向页面注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本将会执行。具体而言，具备贡献者权限的攻击者可以通过自定义 HTM

CVSS 6.4 · Medium

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-8625

Vulnerability Information
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Vulnerability Title
Dear Flipbook <= 2.4.30 - Authenticated (Contributor+) Stored Cross-Site Scripting via '.df-element' Element Inner HTML
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
dearhive DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer 0 ~ 2.4.30 -

II. Public POCs for CVE-2026-8625

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III. Intelligence Information for CVE-2026-8625

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Other References for CVE-2026-8625 (8)

IV. Related Vulnerabilities

Same product: DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer
Same vendor: dearhive
Same weakness: CWE-79

V. Comments for CVE-2026-8625

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